In this еquity action, Sophia Cheloha, as personal representative of the estate of Alphons Cheloha, deceased, filed a third amended petition in the district court, seeking an accounting from Alphons’ brother, Carl C. Cheloha, and Carl’s son, Robert C. Cheloha, as to all transactions they entered into on behalf of Alphons by virtue of a durable power of attorney. Sophia alleged that sums of money expended by Carl and Robert, in their capacities as Alphons’ attorneys in fact, were not solely for the benefit of Alphons. Following a bench trial, the district court entered judgment, finding that Robert converted $33,495.05 in either principal or interest from certificates of deposit owned by Alphons to his own use and awarded Sophia that amount plus postjudgment interest and costs. Robert appeals, and Sophia cross-appeals.
*34 I. FACTUAL BACKGROUND
Alphons was a bachelor and retired farmer who lived in rural Platte County, Nebraska. In 1986, Alphons was admitted to a nursing home, but sometime later was able to return to his own home. However, in late July or August 1988, Alphons was again admitted to a nursing home, where he remained until his death on October 10, 1993.
Robert was Alphons’ nephew and lived less than a mile from Alphons’ home. During Alphons’ lifetime, few people other than Robert paid any attention to Alphons or his needs. Robert cleared snow from Alphons’ roads, trimmed his trees, provided transportation for him for doсtor’s appointments, and made arrangements for his medical and nursing home care. In addition, Robert paid Alphons’ bills, managed his finances, and provided transportation for him to purchase his groceries.
Robert testified that in April 1986, he had a discussion with Alphons regarding Robert’s desire to be compensated for the services that he had been providing to Alphons. Robert testified that he had this discussion with Alphons at the nursing home in the presence of Robert’s wife and pаrents. According to Robert, as corroborated by his mother, Robert told Alphons that his care was more responsibility than Robert could handle, to which Alphons allegedly responded, “I am so glad that you have been helping me, that you are helping me, and I want you to be paid.”
Robert testified that after this conversation, he discussed the matter with the family attorney, Cleo Robak. Robert told Robak what Alphons had said, and Robak told Robert that he was entitled to compensation. Robak testified by deposition that he was never informed or heard of any agreement between Alphons and Robert for the payment of compensation. Robak, however, did testify that sometime after problems began to surface with Alphons, Robak told Robert that he could charge a reasonable fee for whatever work he had done for Alphons, although no further details were discussed and no legal work was embarked upon by Robak to specifically deal with this issue.
On August 11, 1988, Alphons executed a durable power of attorney, naming Carl and Robert as his attorneys in fact. Robak testified that in preparing Alphons’ power of attorney, Robak had no knowledge of any discussion between Alphons and *35 Robert regarding an agreement for the payment of compensation for services rendered by Robert pursuant to the power of attorney. The power of attorney instrument did not contain a provision authorizing Robert to compensate himself or a provision authorizing Robert to make gifts from Alphons’ property.
On September 20, 1995, Sophia, as personal representative of the estate of Alphons, filed a third amended petition in equity in the district court, seeking an accounting from Carl and Robert as to all transactions they entered into on behalf of Alphons by virtue of the power of attorney. Sophia alleged that sums of money expended by Carl and Robert, in their capacities as Alphons’ attorneys in fact, were not solely for the benefit of Alphons and were, in fact, paid to the detriment of Alphons. At the bench trial on the matter, Robert admitted that he used the power of attorney in order to convert $33,495.05 in certificates of deposit owned by Alphons to his own use. Robert, however, testified that he received these monies as compensation for services rendered by him pursuant to аn oral contract with Alphons. Robert also admitted to using the power of attorney to make various purchases and disbursements with money from Alphons’ checking account. Robert, however, testified that these various purchases or disbursements constituted either gifts, reimbursement of expenses, or compensation for services rendered.
Following the bench trial, the district court entered judgment, finding that Robert converted $33,495.05 in either principal or interest from cеrtificates of deposit owned by Alphons to his own use and awarded Sophia that amount plus postjudgment interest and costs. The district court dismissed the petition as it related to Carl, since no evidence was submitted that he had ever come into possession, control, or management of Alphons’ property. Robert appeals, and Sophia cross-appeals. We removed the case to our docket pursuant to our power to regulate the caseloads of the Nebraska Court of Appeals and this court. See Neb. Rev. Stat. § 24-1106(3) (Reissue 1995).
II. SCOPE OF REVIEW
An action for an accounting of estate property is in equity.
Mischke v. Mischke,
III. ASSIGNMENTS OF ERROR
Robert’s four assignments of error can be consolidated and restated into the following one: The trial court erred in finding that the conversion of Alphons’ certificates of deposit represented a gift to Robert as Alphons’ attorney in fact rаther than compensation for services rendered pursuant to an express or implied contract.
In her cross-appeal, Sophia assigns the following two errors: The trial court erred in (1) determining that she was not entitled to a money judgment for funds wrongfully converted from Alphons’ checking account to Robert’s personal use pursuant to the power of attorney and (2) not awarding prejudgment interest.
IV. ANALYSIS
1. Power of Attorney
A power of attorney authorizes another to act as one’s agent.
Mischke
v.
Mischke, supra; Fletcher v. Mathew,
Generally, an agent is required to act solely for the benefit of his or her principal in all matters connected with the agency and adhere faithfully to the instructions of the principal.
Fletcher v.
*37
Mathew, supra.
An agent and principal are in a fiduciary relationship such that the agent has an obligation to refrain from doing any harmful act to the principal.
Id.
An agent is prohibited from profiting from the agency relationship to the detriment of the principal.
Mischke
v.
Mischke,
supra;
In re Estate of Lienemann,
It is well settled that no gift may be made by an attorney in fact to himself or herself unless the power to make such a gift is expressly granted in the instrument itself and there is shown a clear intent on the part of the principal to make such a gift. Mischke v. Mischke, supra. We adopted the foregoing rule in Fletcher v. Mathew, supra, in order to discourage fraud and abuse by attorneys in fact. Thus, absent express intention, an agent may not utilize his or her position for his or her or a third party’s benefit in a substantially gratuitous transfer. Mischke v. Mischke, supra.
Robert asserts that his conversion of $33,495.05 in principal or intеrest from Alphons’ certificates of deposit to his own use represented compensation for services rendered by him pursuant to an express oral contract or an implied contract and that, thus, the district court erred in awarding Sophia $33,495.05. At trial, however, Robert did not raise the theory that he properly converted Alphons’ certificates of deposit pursuant to an implied contract. Therefore, on appeal, our sole inquiry is whethеr an express oral contract existed whereby Alphons agreed to pay Robert $33,495.05 in certificates of deposit as compensation for services rendered. See
Sunrise Country Manor v. Neb. Dept. of Soc. Servs.,
A court of equity will not enforce a contract unless it is complete and certain in all its essential elements.
Sayer v. Bowley,
In the instant case, the only evidence in the record that would support a mutual understanding between Alphons and Robert that Robert’s services were not rendered gratuitously was the self-serving testimony of Robert and the testimony of his mother that Alphons told Robert that Alphons would pay Robert for his services. Even assuming that this conversation did, in fact, take place and that a contract was formed between the parties, the record contains no evidence of a mutual understanding as to the specific terms of the compensation to be paid to Robert. While Robert testified that 4 years after the alleged conversation with Alphons, Alphons told Robert that he was entitled to á certificate of deposit as compensation for services rendered, there is no evidenсe in the record as to which certificate of deposit or as to the amount of the particular certificate of deposit to which Robert was entitled. In short, the record is devoid of any evidence as to the material terms of the purported contract, and thus, as an appellate court, it is not our function to supply the terms for the parties and enforce the parties’ alleged contract for the payment of compensation for services rendered.
Moreover, contrary to Robert’s claim of a contract for compensation of services, the record reveals that Robert never reported the income he received from the certificates of deposit on his tax returns, thereby supporting an inference that the certificates of deposit did not represent compensation for services rendered. Mutual assent to an agreement is dеtermined by the objective manifestations of intent by the parties, not by their subjective statements of intent. See
Viking Broadcasting Corp.
v.
Snell Publishing Co.,
Therefore, we determine from our de novo review of the record that Robert’s conversion of Alphons’ certificates of deposit to Robert’s own use was not pursuant to any enforceable oral contract, but, rather, was a substantially gratuitous transaction. Moreover, since the power of attorney did not expressly grant Robert the power to make gifts with Alphons’ property, Robert has failed to meet his burden of proof with respect to the *39 proper disposition of Alphons’ certificates of deposit and interest totaling $33,495.05. Accordingly, the district court was correct in awarding Sophia the sum of $33,495.05 with respect to the certificates of deposit. Robert’s assignment of error is without merit.
2. Sophia’s Cross-Appeal
(a) Checking Account
In her cross-appeal, Sophia asserts that the trial court erred in not awarding a judgment against Robert for money he wrongfully converted from Alphons’ checking account to his own use. Robert admits to using the power of attorney to make various purchases and disbursements with money from Alphons’ checking account; however, Robert contends that these various purchases or disbursements were proper because they represented either reimbursement of expenses, compensation for services rendered, or gifts.
As we address Sophia’s claims in our de novo review, we recognize that the nature of many of the checking account expenditures was in dispute, and we have considered and given weight to the fact that the trial court observed the witnesses and accepted one version of facts over another with respect to several of the transactions. See
Schram Enters. v. L & H Properties,
However, based on the principles set forth in
Fletcher
v.
Mathew,
As to those purchases made with Alphons’ money allegedly constituting gifts, Robert wrote checks to Wal-Mart totaling $7,055.74. While Robert testified that these purchases were primarily for personal items for Alphons, Robert also testified that a portion of those purchases was for gifts for his wife and children pursuant to Alphons’ oral authorization. Despite Alphons’ alleged oral authorization, because the power of attorney did not grant Robert the power to make gifts with Alphons’ property and the purchases were not solely for Alphons’ benefit, we determine that Robert has failed to meet his burden of proof with respect to the disposition of Alphons’ money in the amount of $7,055.74.
*41 Robert also purchased a radar detector for $240.14. Robert testified that Alphons authorized Robert to purchase a radar detector so that he would not get speeding tickets while transporting Alphons to doctor’s appointments. Because we do not find Robert’s testimony credible in that regard, we determine that Robert has failed to meet his burden of proof with respect to the proper disposition of Alphons’ money in the further sum of $240.14.
Based on the foregoing, we determine that the trial court erred in not awarding Sophia a judgment in the amount of $8,117.53 for funds wrongfully converted from Alphons’ checking account to the benеfit of Robert.
(b) Prejudgment Interest
Sophia asserts that the trial court wrongly applied an old version of Nebraska’s prejudgment interest statute, Neb. Rev. Stat. § 45-103.02 (Reissue 1993), in denying her request for an award of prejudgment interest. Sophia claims that under the amended version, § 45-103.02 (Cum. Supp. 1996), she is entitled to prejudgment interest.
The version of § 45-103.02 that the trial court applied in the instant case provided the following:
Except as provided in section 45-103.04, judgment interest shall also accrue on decrees аnd judgments for the payment of money from the date of the plaintiff’s first offer of settlement which is exceeded by the judgment until the rendition of judgment if all of the following conditions are met:
(1) The offer is made in writing upon the defendant...;
(2) The offer is made not less than ten days prior to the commencement of the trial;
(3) A copy of the offer and proof of delivery to the defendant... is filed with the clerk of the court in which the action is pending; and
(4) The offer is not accepted prior to trial or within thirty days of the date of the offer, whichever occurs first.
§ 45-103.02 (Reissue 1993). Under this version of § 45-103.02, in order to receive prejudgment interest in a cause of action accruing after January 1, 1987, a litigant
must
comply with the
*42
four requirements of § 45-103.02. See,
Pantano
v.
McGowan,
However, in 1994, the Legislature amended § 45-103.02, which now provides the following:
(1) Except as provided in section 45-103.04, interest as provided in section 45-103 shall accrue on the unpaid balance of unliquidated claims from the date of the plaintiff’s first offer of settlement which is exceeded by the judgment until the rendition of judgment if all of the fоllowing conditions are met:
(a) The offer is made in writing upon the defendant.. . ;
(b) The offer is made not less than ten days prior to the commencement of the trial;
(c) A copy of the offer and proof of delivery to the defendant... is filed with the clerk of the court in which the action is pending; and
(d) The offer is not accepted prior to trial or within thirty days of the date of the offer, whichever occurs first.
(2) Except as provided in section 45-103.04, interest as provided in section 45-104 shall accrue on the unpaid balаnce of liquidated claims from the date the cause of action arose until the rendition of judgment.
(Emphasis supplied.) § 45-103.02 (Cum. Supp. 1996). Thus, under the amended version of § 45-103.02, compliance with the four conditions is no longer a prerequisite for an award of prejudgment interest if interest is provided for in Neb. Rev. Stat. § 45-104 (Reissue 1993) and the claim is liquidated. Before analyzing whether interest is available pursuant to § 45-104 and the claim is liquidated, it is necessary for us to resolve the question whether the amended prеjudgment interest statute is applicable in the instant case.
Where an amendment to a statute makes a procedural change, it is binding upon a tribunal on the effective date of the amendment and is applicable to pending cases that have not been tried.
Stansbury
v.
HEP, Inc.,
A substantive law creates duties, rights, and obligations, whereas a procedural law prescribes the means and methods through and by which substantive laws are enforced and applied. Stansbury v. HEP, Inc., supra. See, also, Jackson v. Branick Indus., supra. In the instant case, the amendments to § 45-103.02 did not create a new substantive right to prejudgment interest on liquidated and unliquidated claims, since that right was already provided for in the statute. Rather, the amendments to the statute merely altered the method for exercising the right to prejudgment interest in a cause of action where the claim is liquidated. Therefore, because we determine that the amendments to the statute were procedural in nature, the district court erred in not applying the amended version of § 45-103.02 to determine whether prejudgment interest should be awarded in the instant case. Nevertheless, it still must be resolved whether interest is provided for pursuant to § 45-104 and whether Sophia’s claim is liquidated.
First, with regard to whether interest is available pursuant to § 45-104, this section states in relevant part that “[ujnless otherwise agreed, interest shall be allowed at the rate of twelve percent per annum ... on money received to the use of another and retained without the owner’s consent, express or implied, from the receipt thereof....” Under this section, an agent is chargeable with interest at the legal rate from the time that the money is wrongfully withheld frоm the principal. See
Pearlman
v.
Snitzer,
Second, with regard to whether Sophia’s claim is liquidated, it is well settled that a claim is liquidated when there is no reasonable controversy either as to the plaintiff’s right to recover or as to the amount of suсh recovery. See,
Blue Tee Corp. v. CDI
*44
Contractors, Inc.,
Since the damages were liquidated and no reasonable controversy existed as to Robert’s conversion of $33,495.05 in principal and interest from Alphons’ certificates of deposit to his own use, Sophia was entitled to prejudgment interest as a matter of law on that amount from the time that Robert received the certificates of deposit. See
Fletcher v. Mathew,
V. CONCLUSION
For the foregoing reasons, the district court’s judgment is modified to provide a total recovery of $59,486.32, and as modified, it is affirmed in all other respects.
Affirmed as modified.
