Assessment when prices affect taxable income.

When any corporation liable to taxation under this chapter conducts its business in such a manner as either directly or indirectly to benefit the members or stockholders thereof or any person interested in such business, by selling its products or the goods or commodities in which it deals at less than the fair price which might be obtained therefor, or where a corporation, a substantial portion of whose capital stock is owned either directly or indirectly by another corporation, acquires and disposes of the products of the corporation so owning a substantial portion of its stock in such a manner as to create a loss or improper net income, the department may determine the amount of taxable income to such corporation for the calendar or fiscal year, having due regard to the reasonable profits which but for such arrangement or understanding might or could have been obtained from dealing in such products, goods or commodities.