*343 Opinion
Defendant and appellant Philadelphia Indemnity Insurance Company (Philadelphia) and plaintiff and appellant Employers Mutual Casualty Company (Employers) insured Louis Simpson doing business as Villa Park Mobilehome Park (Simpson). Employers and Evanston Insurance Company (Evanston) 1 defended Simpson in Brogan v. Simpson (Super. Ct. L.A. County, 2006, No. BC307069) (Brogan action) against the “failure to maintain” claims of 188 residents of Simpson’s mobilehome park. Employers and Evanston eventually settled for $3 million, allocating $1.2 million to damages and $1.8 million for plaintiffs’ attorney fees under Civil Code section 798.85. 2 Evanston assigned its rights to Employers. Employers sued Philadelphia for contribution and prevailed. Philadelphia was required, inter alia, to contribute $164,613.15 for defense fees and costs. Under the supplementary payments coverage in its policies, Philadelphia was required to contribute $400,000 toward the section 798.85 attorney fees on the theory that they were a taxed cost.
Philadelphia appeals, arguing (1) no costs were taxed against Simpson by a court, so it does not have to contribute toward the $1.8 million payment; (2) the plaintiffs in the Brogan action were not entitled to attorney fees pursuant to section 798.85, so it cannot be liable for any statutory attorney fees under its supplementary payments coverage; (3) even if it has to contribute toward the $1.8 million payment, it should be pro rated at less than $400,000 because only 109 of the 188 3 plaintiffs in the Brogan action were conceivably injured during the relevant policy periods; (4) it should not have to contribute toward the $83,216.76 Evanston paid for independent counsel for Simpson because the cost was not a shared burden; and (5) it should not have to contribute toward duplicative defense fees and costs.
Employers cross-appeals on the grounds that the trial court erred when it did not award prejudgment interest.
We affirm.
*344 FACTS
The Philadelphia policies
Philadelphia provided Simpson with consecutive one-year commercial general liability policies from March 2, 1997, to March 2, 1999. Each policy provided limits of $1 million per occurrence.
The insuring agreements stated that Philadelphia would defend and indemnify Simpson with respect to claims seeking damages because of bodily injury or property damage caused by an occurrence within the policy period. The supplementary payments coverage provided that Philadelphia would pay “[a]ll costs taxed against the insured in the ‘suit.’ ”
The Brogan action
Simpson owns the Villa Park mobilehome park in Long Beach. On December 30, 2003, he was sued by 188 of the Villa Park residents under the Mobilehome Residency Law. 4 They alleged that Simpson failed to maintain Villa Park’s sewer system, electrical system, water system, drainage system, gas system, streets, trees and bushes, clubhouse and recreation room, laundry facilities, trash area, car wash area, fences and walls, restrooms and pool. They also claimed that Simpson failed to provide adequate lighting.
Simpson tendered the defense to Employers, Evanston, Scottsdale Insurance Company (Scottsdale) 5 and Philadelphia. Employers and Evanston accepted the tender of defense. Employers appointed Gray, York & Duffy (Gray firm) and Evanston appointed Selman Brietman (Selman firm) to represent Simpson. Simpson retained Lewis, Brisbois, Bisgaard & Smith (Lewis firm) as independent defense counsel under section 2860, subdivision (a). 6 Philadelphia and Scottsdale denied coverage.
The Brogan action settled on May 4, 2006, for $3 million (Brogan settlement). Employers and Evanston each paid $1.5 million. The Brogan *345 settlement allocated $1.8 million of the proceeds to plaintiffs’ attorney fees and costs pursuant to section 798.85. 7 The rest covered damages.
Employers and Evanston paid posttender attorney fees and costs in the following amounts: $83,216.76 to the Lewis firm, $196,198.89 to the Selman firm and $461,343.51 to the Gray firm for a total of $740,759.16. Evanston assigned its contribution rights to Employers.
The present action
Employers sued Philadelphia and Scottsdale for contribution toward the $3.7 million cost of the Brogan action. In particular, Employers sought $823,745.59. The trial was bifurcated into a duty to defend phase and indemnity phase. The parties stipulated to various facts, and also to the admissibility of documents, their discovery, and discovery in the Brogan action.
After the first phase, the trial court ruled that Philadelphia and Scottsdale had a duty to defend Simpson.
Following the indemnity phase, the trial court issued a statement of decision and judgment. The trial court applied the “time on the risk” method of allocating the costs associated with the Brogan action. The relevant time period was 1995 to 2004, which placed two-ninths of the burden on Scottsdale (1995-1997) and two-ninths on Philadelphia (1997-1999). Employers assumed five-ninths of the burden.
Toward the $1.2 million paid for damages, Scottsdale owed Employers $97,872.34 and Philadelphia owed $154,609.93. To calculate these sums, the trial court multiplied $1.2 million by the time on the risk and the percentage of Brogan plaintiffs present at Villa Park during the relevant policy periods. 8 According to the trial court: “Scottsdale and Philadelphia had the opportunity to present evidence that portions of these sums were for injuries and damages beyond the coverage of the policies that Scottsdale and Philadelphia issued to Simpson. This future step would have reduced the sums by the amounts that Scottsdale and Philadelphia proved were paid for claims not covered by their policies with Simpson. By unanimous agreement, however, the parties have decided to waive this opportunity.”
Under the supplementary payments coverage, the trial court ruled that Scottsdale and Philadelphia owed Employers contribution of two-ninths ($400,000) of the $1.8 million payment for statutory attorney fees.
*346 Though Scottsdale and Philadelphia argued that the $1.8 million was not “taxed” because no court entered an order of taxation, the trial court opined: “The word ‘taxed’ does not literally require a court order of taxation. The word ‘taxed’ properly encompasses this situation, where the settling parties forecasted and compromised their estimates about the sums likely if the matter went to trial and to an eventual court order. [1] Neither Philadelphia nor Scottsdale gave a restrictive definition for this word ‘taxed’ in their policies. In fact, they did not define the key word at all. Courts interpret ambiguities in contracts against the drafter, which here would be Philadelphia and Scottsdale .... A dictionary definition of a ‘taxable’ cost is a cost ‘proper to be taxed or charged up; legally chargeable or assessable.’ [Citation.] Nothing in this dictionary definition requires [a] court order . . . before a cost may be ‘taxed.’ ”
The trial court declined to multiply Scottsdale’s and Philadelphia’s share of the $1.8 million by the percentage of Brogan plaintiffs present at Villa Park during the relevant policy periods (109/188). “This issue turns on whether the $1.8 million sum is more like a fixed or a variable cost. From the insurers standpoint, the $1.8 million cost was fixed. There should be no pro rata reductions to the reimbursements due on this fixed cost. The $1.8 million cost was fixed because it never varied in any way that Philadelphia and Scottsdale would have been able to control. This $1.8 million sum was the parties’ compromise on the total fees incurred by the plaintiffs’ counsel. The insurers were on the defense side. Defendants and defense lawyers cannot control the activity or billing by the plaintiffs’ lawyers. From the defense perspective, then, the plaintiffs’ legal bill was a fixed cost because it came in a single undifferentiated lump. The plaintiffs did not care about whether injury or damages was progressive or not. . . . The Brogan plaintiffs’ attorneys thus had no reason to explore whether their clients’ injuries and damages were progressive. With respect to that issue, then, the plaintiffs’ legal bill did not vary.”
Next, the trial court concluded that Scottsdale and Philadelphia each owed Employers $164,613.15, which was two-ninths of the defense costs. Because Scottsdale and Philadelphia did not participate in the defense, they waived the right to complain about legal fees. Once again, the trial court declined to multiply Scottsdale’s and Philadelphia’s contribution by the percentage of Brogan plaintiffs present at Villa Park during the relevant policy periods. The trial court reasoned that the defense legal bill was a fixed cost.
Finally, the trial court denied Employers’ request for prejudgment interest. It found that the amount of damages depended upon a judicial determination based on conflicting evidence.
*347 STANDARD OF REVIEW
Contractual and statutory interpretations are questions of law reviewed de novo.
(Parsons v. Bristol Development Co.
(1965)
If the requirements of section 3287, subdivision (a) are met, an award of prejudgment interest is mandatory.
(North Oakland Medical Clinic v. Rogers
(1998)
DISCUSSION
I.
Philadelphia’s Appeal
Philadelphia assigns error to the trial court’s determination of what it must contribute toward the cost of the Brogan action. This attack parses into subissues, which we have taken up below.
*348 A. The law of equitable contribution.
Multiple insurers on the same risk have reciprocal rights and duties that arise out of equitable principles.
(Signal Companies, Inc. v. Harbor Ins. Co.
(1980)
B. The trial court did not err when it required Philadelphia to contribute $400,000 toward the payment of statutory attorney fees.
Philadelphia contends that it is not required to contribute to the $1.8 million Employers seeks to recover for attorney fees and costs paid to Simpson in the Brogan settlement. This contention lacks merit.
1. The $1.8 million payment represented a taxed cost.
In the supplementary payments coverage, Philadelphia’s policies provided that it would pay “[a]ll costs taxed against the insured in the ‘suit.’ ” The parties dispute the meaning of “taxed.”
An insurance policy is interpreted according to the plain meaning a layperson would ordinarily give it unless the parties used a word or phrase in a technical sense or it has special meaning due to usage. Ambiguities or uncertainties are resolved against the insurance company so that, if feasible, the policy will indemnify the loss to which the insurance relates. These rules exist to protect the insured’s reasonable expectation of coverage. Coverage clauses are interpreted broadly and exclusionary clauses are interpreted narrowly.
(Reserve Insurance Co. v. Pisciotta
(1982)
The dictionary defines the verb “tax” as meaning to judicially assess the amount of costs, levying a tax on and making an onerous demand on. (Merriam-Webster’s Collegiate Diet. (10th ed. 1993) p. 1208, col. 1.) According to Philadelphia, the first definition is the one intended by the parties. But *349 in our view the use of the word “taxed” in Philadelphia’s policies is ambiguous. It could narrowly refer to a judicial assessment of costs or broadly to any levy of an assessment. Following precedent, we are required to interpret “taxed” broadly if feasible. We find it feasible to do so without perverting semantics. Thus, we construe the term broadly.
Philadelphia argues the first dictionary definition is the only meaning possible because it coincides with the technical or legal definition of taxed. We are directed to consider California Rules of Court, rule 3.1700(b)(1). That rule sheds no light on our analysis. It contemplates a motion to strike or tax costs that are objectionable and should be eliminated or reduced. Whereas the word “tax” in California Rules of Court, rule 3.1700(b)(1) refers to a reduction of costs, the word “taxed” in Philadelphia’s policies refers to an assessment.
In
Prichard v. Liberty Mutual Ins. Co.
(2000)
As a matter of policy and equity, our interpretation is sensible. It permits an insured to settle a claim instead of pursuing an action to judgment and risking a greater liability. It also permits one of multiple insurers to settle an action and seek contribution of taxed costs. Public policy encourages settlement.
(Great Western Bank
v.
Converse Consultants, Inc.
(1997)
In its reply brief, Philadelphia argues that Employers is estopped from claiming that statutory attorney fees fall within the supplementary payments coverage of the Philadelphia policies. This is so, according to Philadelphia, because there is no evidence that Employers or Evanston paid any portion of the
Brogan
settlement out of their own supplementary payments coverage. Philadelphia did not cite any case authority for this proposition, nor did it advance this proposition in its opening brief, so the argument is doubly
*350
waived. An appellate court can deem an argument waived if it is not supported by analysis or argument in the appellate briefs.
(Associated Builders & Contractors, Inc. v. San Francisco Airports Com.
(1999)
For the sake of being complete, we reject Philadelphia’s belated argument on the merits. To apply the equitable estoppel doctrine, four elements must be present: “ ‘(1) the party to be estopped must be apprised of the facts; (2) he must intend that his conduct shall be acted upon, or must so act that the party asserting the estoppel had a right to believe it was so intended; (3) the other party must be ignorant of the true state of facts; and (4) he must rely upon the conduct to his injury.’ ”
(City of Long Beach v. Mansell
(1970)
Also in the reply brief, and also for the first time, Philadelphia argues that the “obligation to pay costs taxed to the insured ‘arises only after liability is established’ ”
(Combs v. State Farm Fire & Casualty Co.
(2006)
*351 2. There was a statutory basis for the $1.8 million in costs.
Section 798.85 provides that the prevailing party in an action under the Mobilehome Residency Law “shall be entitled to reasonable attorney’s fees and costs. A party shall be deemed a prevailing party for the purposes of this section . . . where the litigation is dismissed in his or her favor prior to or during the trial, unless the parties otherwise agree in the settlement or compromise.” Pursuant to the settlement agreement, the Brogan action was dismissed in Simpson’s favor. Nonetheless, the settlement agreement provided that in consideration for the dismissal, the plaintiffs in the Brogan action were entitled to $1.8 million in attorney fees.
According to Philadelphia, Employers cannot recover the $1.8 million it paid for attorney fees because the Brogan settlement was silent as to whether the plaintiffs were the prevailing parties. Philadelphia contends that section 798.85 did not authorize attorney fees and they were not recoverable under Code of Civil Procedure section 1033.5, subdivision (a)(10)(B). We disagree. Although the Brogan settlement did not specifically say that the plaintiffs were the prevailing parties, they were by virtue of Simpson’s agreement to pay $3 million. To conclude otherwise would be to exalt form over substance.
3. There is no basis in the appellate record for reducing Philadelphia’s share of statutory attorney fees.
Philadelphia contends that 79 out of 181 10 of the plaintiffs in the Brogan action did not reside in Villa Park until after March of 1999. As a result, Philadelphia contends that it can be asked to contribute to only 109/181 ($1,014,364.75) of the $1.8 million in attorney fees. Applying the two-ninths time on the risk ratio used by the trial court to $1,014,364.75, Philadelphia argues that its equitable share should be $225,414.39 instead of $400,000. This argument is unavailing.
The trial court found that the $1.8 million in attorney fees was a fixed cost that did not change due to the 79 plaintiffs who moved into Villa Park after Philadelphia’s last policy expired in 1999. We are invited to apply a de novo standard of review because the parties stipulated to certain facts. But Philadelphia does not explain or establish by argument or citations to the record whether the trial court was asked to resolve the issue of whether the attorney fees were a fixed cost or whether this issue was resolved by stipulation. “It is not our responsibility to develop an appellant’s argument.”
*352
(Alvarez v. Jacmar Pacific Pizza Corp.
(2002)
Based on the foregoing, the question presented is whether substantial evidence supported the trial court’s finding. Philadelphia, however, does not contend that this factual finding was deficient. Notably, an appellant bears the burden of showing that the trial court erred. (See
Ballard
v.
Uribe
(1986)
Aside from this waiver, Philadelphia’s argument is unavailing. It argues: “The claims of each Brogan plaintiff are separate and distinct from the claims of every other Brogan plaintiff. Although each of the Brogan plaintiffs shared the common feature of being a co-plaintiff with 180 [¿ic] others in a single lawsuit, each plaintiff’s case was [a] separate lawsuit. The Brogan [a]ction was not a class or representative action. As such, each plaintiff’s case was entitled to separate consideration. See BAJI 15.00; CACI 5005. Correspondingly, the attorneys representing the Brogan plaintiffs had an equal duty of representing each of their 181 \sic] clients. On that basis, the statutory attorney’s fees and costs totaling $1.8 million can be allocated per plaintiff in the amount of $9,944.75.” The defect in Philadelphia’s position is apparent. It did not provide record citations that permit us to determine whether the attorney fees can be segregated by plaintiff.
As we must, we presume that the trial court’s factual findings were correct.
(Ehrler v. Ehrler
(1981)
C. The trial court did not err when it required Philadelphia to contribute $164,613.15 toward defense fees and costs.
Philadelphia attacks the contribution award of $164,613.15 on two grounds. The first is that the amount is erroneous insofar as it represents contribution toward the $83,216.76 Evanston paid to the Lewis firm as Cumis counsel. The second is that it should not have to contribute to the fees and costs of both the Gray firm and Selman firm because they are duplicative.
As discussed below, we do not concur.
1. The burden of Cumis counsel was properly allocated.
According to Philadelphia, Employers is not entitled to contribution toward
Cumis
fees because the other insurers did not have a conflict of interest and the obligation was not concurrently borne. Philadelphia does not contend that the trial court abused its discretion in allocating the defense costs. Instead, Philadelphia simply argues the issue anew. As a result, the issue has been waived.
(Tan v. California Fed. Sav. & Loan Assn.
(1983)
Our analysis could stop here.
In its opening brief, Philadelphia argues that the cost of Cumis counsel was not a common burden. But Philadelphia stood to gain if Evanston successfully challenged coverage. Thus, in our view, it was equitable for Philadelphia to share in the cost of Simpson’s Cumis counsel.
2. The Gray firm’s and Selman firm’s fees and costs were properly allocated.
Next, Philadelphia argues that because Employers and Evanston appointed the Gray firm and Selman firm, “an equitable apportionment of the fees and costs for the duplicate defense should be based on an average total of the fees and costs for these two firms. Put simply, pursuant to equitable consider *354 ations, [Employers] is not entitled to recover the attorney’s fees and costs in connection with both its, and Evanston’s, retention of defense counsel.”
A familiar defect herein rears its head. There are no record citations backing up the assertion that the attorney fees of the Gray firm and Selman firm were duplicative. They may well have been duplicative, but our job is to analyze record citations, not engage in speculation. Thus, we are in no position to assess whether Philadelphia rebutted the presumption that the cost of defense was reasonable.
(Pruyn, supra,
More importantly, we must adopt all intendments and inferences to affirm the judgment unless the record expressly contradicts them. (See
Brewer v. Simpson
(1960)
II.
Employers’ Cross-appeal
Employers argues that it was entitled to prejudgment interest because its damages became certain on the date of the Brogan settlement.
We disagree.
A. The law of prejudgment interest.
The applicable statute provides that “[ejvery person who is entitled to recover damages certain, or capable of being made certain by calculation, and the right to recover which is vested in him upon a particular day, is entitled also to recover interest thereon from that day ...” (§ 3287, subd. (a).)
Damages are deemed certain when, though the parties dispute liability, they essentially do not dispute the computation of damages, if any.
(Wisper Corp. v. California Commerce Bank
(1996)
B. Prejudgment interest was properly denied.
To make its case for prejudgment interest, Employers relies on
Hartford Accident & Indemnity Co. v. Sequoia Ins. Co.
(1989)
In
Hartford,
an insurer settled a case involving a car accident for approximately $1.8 million. The settling insurer sued two nonsettling insurers. It obtained damages awards but not prejudgment interest. The prejudgment interest was awarded on appeal because “the amount of damages recoverable was ‘certain, or capable of being made certain by calculation’ and was ‘vested’ in [the settling insurer] on October 14, 1986, the day [the settling insurer] exhausted its primary policy limit and first paid out money under its umbrella policy.”
(Hartford, supra,
The record is inadequate for us to apply Hartford and second guess the trial court. Though Employers contends that this case was tried on stipulated facts, the record suggests the contrary. The parties stipulated to the admissibility of their discovery as well as discovery in the Brogan action. The bulk of that discovery is not in the appellate record, nor is it referenced in the appellate briefs. It is impossible for us to determine what discovery and documents the trial court relied on when it determined that the statutory attorney fees and defense fees were fixed. Similarly, we do not know if any evidence conflicted. Thus, there is an unanswered question as to whether the trial court allocated attorney fees pursuant to a judicial determination based on conflicting evidence and whether the calculation was ascertainable from truthful data supplied by Employers to Philadelphia.
*356 DISPOSITION
The judgment is affirmed.
The parties shall bear their costs on appeal.
Doi Todd, Acting P. J., and Chavez, J., concurred.
Notes
Evanston is not a party to this action.
All further statutory references are to the Civil Code unless otherwise indicated.
There is some inconsistency in the numbers. The trial court’s statement of decision states that there were 188 plaintiffs in the Brogan action. In its opening brief, Philadelphia contends that there were 181. The record is clear that 79 of those plaintiffs did not live at Simpson’s mobilehome park until after Philadelphia’s policies expired. The numbers do not affect our decision. We presume there were 188 plaintiffs.
Section 798 et seq.
Scottsdale is not a party to this action.
Section 2860, subdivision (a) requires an insurer with a duty to defend to provide independent counsel to an insured if there is a conflict of interest, such as when the insurer has reserved its right to deny coverage. This codifies the rule announced in
San Diego Federal Credit Union v. Cumis Ins. Society, Inc.
(1984)
Section 798.85 entitles a prevailing party under Mobilehome Residency Law to recover reasonable attorney fees and costs.
For Philadelphia, the formula was $1.2 million x (2/9) x ((188-79)7188) = $154,609.93.
We decline Philadelphia’s invitation to apply an abuse of discretion standard. It cites to
Esgro Central, Inc. v. General Ins. Co.
(1971)
Again, there is inconsistency with the record. According to the trial court, there were 188 plaintiffs.
Philadelphia cites
Oliver & Williams Elevator Corp. v. State Bd. of Equalization
(1975)
