Aрpellant Franchise Tax Board appeals from a judgment in favor of respondent RKO Teleradio Pictures, Inc., hereinafter referred to as RKO, directing a refund of taxes paid under protest for the income years 1945 and 1946.
The facts were stipulated. RKO’s business is the production and distribution of motion pictures. It is a wholly owned subsidiary of Radio-Keith-Orpheum Corporation. Its principal offices are in New York City, where its managing officers control its entire business operation, involving all phases of the production and world-wide distribution of motion picture films. RKO produces motion pictures and distributes them *814 through its own distribution facilities, but it also distributes films produced by others. At all times relevant here, RKO produced its films in its own studios at Hollywood and Culver City. It mаde its studio facilities available to independent film producers, helped finance their production, and by agreement, distributed such films through its distribution network. The same personnel and facilities were used by RKO in the distribution of all films, whether produced by RKO or by others. RKO would have had to maintain the distribution system even if no outside production had been utilized, but of course the stream оf films produced by others added substantially to RKO’s gross income.
In the years 1939 to 1944 the Franchise Tax Commissioner permitted motion picture companies to apportion their income between that received from the production and distribution of their own films, and that received from the distribution of films produced by others, and in the determination of California incomе, to apply separate allocation formulas based upon factors described in Revenue and Taxation Code section 25101. 1 In 1945, however, the commissioner’s office advised the motion picture industry, including respondent RKO, that the practice of using multiple allocation formulas in computing income from California sources would no longer be permitted, and that as to future taxable years a single formula would be required. Despite this warning, RKO determined to and did file its income tax returns for the years 1945 (filed in 1946) and 1946 (filed in 1947) and computed its income from California sources by use of a double formula rather than a single one as required by the commissioner.
In summary, RKO’s method of stating its income involved a separation of its total income into two parts, first, income derived from the production and distribution of its own films, and second, income derived from the distribution of the films of others. With respect to income from the production and distribution of its own films RKO applied a formula which consisted of a comparison of its California property, payroll *815 and revenues with its total property, pаyroll and revenues, both within and outside of California. RKO applied a second formula to income received from the distribution of others’ films. Both formulas used the same revenue factor, a comparison of RKO’s California revenues with its total revenues. But the second formula used for its California payroll and property factors only payroll and property relating to RKO’s distribution activities.
In the examination of respondent’s tax returns for 1945 and 1946 the Franchise Tax Board determined that a single three-factor formula should have been used by RKO in the computation of its California income. The board’s formula consisted of a comparison of RKO’s California property, payroll and revenues with RKO’s total property, рayroll and revenues, both within and outside of California. The board’s method thus did not allow RKO to divide its income from the distribution of films between that received from distribution of films produced by it and that received from distribution of films produced by others. The board’s formula resulted in a substantial increase in RKO’s taxes.
The trial court accepted the stipulated facts as true, and cоncluded that the production and distribution of motion pictures owned by RKO was a separate and distinct operation from the distribution of pictures owned and produced by independent producers; that the application of a single formula to the separate and distinct operations of RKO to determine its California income was arbitrary, unreasonable and resulted in a tax upon extra-territorial values, and that a fair and reasonable tax would result from the application of the double formula used by respondent in its calculation of California income.
The appellant board contends that RKO was operating a single unitary business consisting of the production and distribution of motion pictures; thаt formula allocation of its income is mandatory under Eevenue and Taxation Code section 25101, and that separate accounting in allocating the income of a unitary business is not permissible. Eespondent, on the other hand, takes the position, as it successfully urged in the trial court, that the production by it of motion pictures in California and distribution of its own product throughout the world is a unitary business subject to the use of one formula, while the distribution of pictures produced and owned by *816 others is a separate and distinct operation to which a separate formula is applicable.
The decisive issue in the case is whether respondent was engaged in a single unitary business, or in two separate and distinct business operations. As we have seen, the trial court sustained respondent’s contentions, and found that it was in fact engaged in two separate and distinct business operations, and that a fair tax would result from the application of separate formulas to determine California income. The facts, however, were stipulated. There was no dispute about them, and although some oral testimony was received, no factual question was raised. The trial court’s findings of fact are confined to a single line, and merely recite that the stipulated facts are accepted as true. Where, as here, there is no dispute as to the facts, the trial court’s findings amount only to conclusions of law, and therefore are not binding upon us.
(San Diego T. & S. Bank
v.
County of San Diego,
The Supreme Court of the United States has repeatedly held that a corporation whose income results from a series of transactions involving manufacture in one state with sales in other states is engaged in a unitary business. (See
Underwood Typewriter Co.
v.
Chamberlain,
The unities of ownership, operation and use described in Butler Brothers are clearly present here. We arе concerned here with a single corporate entity having a single corporate income. Thus unity of ownership is obvious and cannot be disputed. Unity of operation appears from the stipulated facts, which disclose the responsibility of RKO’s officers for its total management; their control of its operations, in California and elsewhere, including bоth production and distribution activities, and the use of the same personnel, accounting and record keeping facilities in all of its operations. Unity of use, the third element mentioned in Butler Brothers is established by the stipulated facts describing RKO’s operations, and the further stipulated fact that the same procedures were followed by RKO in the distribution of the films of others as were followed in the distribution of its own product. Moreover, it clearly appears in the record that RKO’s distribution of films owned by others was an important segment of its business because earnings from that source helped to pay the cost of maintaining its world-wide distribution system. Since much of this independent production came about because of RKO’s rental of its studios located in this state, and some of it was financed by RKO, it is clear that this portion of RKO’s business, locally generated, contributed to its operations without the state, and confirms our conclusion that its business was a unitary one. (See Edison California Stores, Inc. v. McColgan, supra, at p. 481.)
Respondent does not directly contend that it is not engaged
*818
in a unitary business. Rather, it takes the position that it is engaged in two separate businesses, each unitary in character, and contends that it may split its totаl income into two segments and apply a separate formula to each for the purpose of allocating a share of its income to California. But the effect of this argument is to say that, on facts here present, a separate accounting of income receipts, segregated as to source, is a permissible step in detеrmining its California income. The language of Revenue and Taxation Code section 25101 clearly states that where income of a taxpayer “. . . is derived from or attributable to sources both within and without the State ...” the California income shall be determined by an allocation upon the basis of factors set forth in the code section. This statutory requirement is mandatory, and where, as here, the total income is derived from sources both within and without the state, separate accounting may not be employed.
(Superior Oil Co.
v.
Franchise Tax Board,
Upon the stipulated facts in our record, we conclude that respondent is engaged in a single unitary business; that its income is derived from sources both within and without this state; that the determination of its California income by mеans of an allocation formula is mandatory by the terms of Revenue and Taxation Code section 25101, and that the separate accounting for which respondent contends cannot be approved.
Although formula allocation of income is made mandatory by section 25101 where the corporate income is derived from sources both within and without the state, any formula used is subject to the fundamental requirement that it not be intrinsically arbitrary, and it must not produce an unreasonable result.
(Butter Brothers
v.
McColgan, supra,
The Franchise Tax Board is given discretion in the selection of the factors to be utilized in a tax formula
(El Dorado Oil Works
v.
McColgan,
Respondent also contends that the board’s notices of assessment were not issued within the four-year period рrescribed by Revenue and Taxation Code section 25663 and that the extension of time allowed by section 25663a has no application to our facts. Section 25663a is applicable to those eases where the taxpayer agrees with the United States Commissioner of Internal Revenue for an extension of time for proposing and assessing defiсiencies in federal income tax, and allows the board a period of six months after the agreed period for assessing deficiencies in federal income tax within
*820
which to mail its notices. Here RKO did agree with federal authorities for an extension of time. It is undisputed that the board mailed its notices of assessment within six months after expiration of the time period agreed upon between RKO and the federal tax service. But respondent argues that the board may only assert a deficiency based upon a change in income made after federal audit, and that since the impact of federal adjustments here had but a slight effect on the state tax, section 25663a cannot apply. We find no merit in this argument, nor does respondent cite any persuasive authority in support of such a restrictive interpretation. The statute, by reasonable inference, contemplates the use by state tax authorities of all information gained through federal tax audits, so that the state, and its taxpayers as a whole, may thereby be saved both time and expense in the administratiоn of the state’s tax laws. Moreover, by state use of federal tax information, the interests of the particular taxpayer whose return is in question are served, in that he, too, is saved the time and expense of a dual audit of his personal and business affairs, and may in some cases ascertain errors in his state tax return sufficient to justify a claim for refund. (See
Richfield Oil Corp.
v.
Franchise Tax Board,
Finally, respondent urges that appellant was guilty of laches and hence is not entitled to the taxes assessed. Here respondent argues that it lacked notice that its use of a double allocation formula would not be allowed, and that it was thereby prevented from mitigating its federal income taxes for the years in question by giving effect to appellant’s later assessments. This, they imply, shows inequity and prejudice to them. But there is nothing in our record to show what, if any, federal tax advantage respondent could have obtained had the state’s tax assessments been known at the time respondent’s federal tax proceedings were concluded. Thus, no prejudice is shown. Absent some showing of prejudice a claim of laches may not be successfully maintained.
(Security T. &
*821
S. Bank
v.
Southern Pac. R.R. Co.,
The judgment is reversed.
Draper, P. J., and Devine, J., concurred.
Bespondent’s petition for a hearing by the Supreme Court was denied February 1, 1967.
Notes
Section 25101 provides in part: "When the income of a taxpayer subject to the tax imposed under this part is derived from or attributable to sources both within and without the State, the tax shаll be measured by the net income derived from or attributable to sources within this State. Such income shall be determined by an allocation upon the basis of sales, purchases, expenses of manufacture, pay roll, value and situs of tangible property or by reference to any of these or other factors or by such other method of allocation as is fairly calculated to determine the net income derived from or attributable to sources within this State. ..."
