(2) If neither the imported goods nor identical nor similar imported goods are sold in Saint Lucia in the condition as imported, then, if the Comptroller so decides, the customs value shall be based on the unit price at which the imported goods, after further processing, are sold in the greatest aggregate quantity to persons in Saint Lucia who are not related to the persons from whom they buy such goods, due allowance being made for the value added by such processing and the deductions provided for in subparagraph (1)(a). Where this method of valuation is used, deductions made for the value added by further processing shall be based on objective and quantifiable data relating to the cost of such work. Accepted industry formulas, recipes, methods of construction and other industry practices shall form the basis of the calculations.