(1) The value of products, including by-products, extracted or manufactured shall be determined by the gross proceeds derived from the sale thereof whether such sale is at wholesale or at retail, to which shall be added all subsidies and bonuses received from the purchaser or from any other person with respect to the extraction, manufacture, or sale of such products or by-products by the seller, except:
(a) Where such products, including by-products, are extracted or manufactured for commercial or industrial use;
(b) Where such products, including by-products, are shipped, transported or transferred out of the state, or to another person, without prior sale or are sold under circumstances such that the gross proceeds from the sale are not indicative of the true value of the subject matter of the sale.
(2) In the above cases the value shall correspond as nearly as possible to the gross proceeds from sales in this state of similar products of like quality and character, and in similar quantities by other taxpayers, plus the amount of subsidies or bonuses ordinarily payable by the purchaser or by any third person with respect to the extraction, manufacture, or sale of such products: PROVIDED, That the value of a product manufactured or produced for purposes of serving as a prototype for the development of a new or improved product shall correspond: (a) To the retail selling price of such new or improved product when first offered for sale; or (b) to the value of materials incorporated into the prototype in cases in which the new or improved product is not offered for sale. The department of revenue shall prescribe uniform and equitable rules for the purpose of ascertaining such values.
[1983 1st ex.s. c 55 § 3; 1975 1st ex.s. c 278 § 42; 1961 c 15 § 82.04.450. Prior: 1949 c 228 § 3; 1941 c 178 § 4; 1935 c 180 § 7; Rem. Supp. 1949 § 8370-7.]
Notes: Effective dates -- 1983 1st ex.s. c 55: See note following RCW 82.08.010.
Construction -- Severability -- 1975 1st ex.s. c 278: See notes following RCW 11.08.160.