Same; sales factor

The sales factor is a fraction, the numerator of which is the total sales of the taxpayer in this state during the tax period, and the denominator of which is the total sales of the taxpayer everywhere during the tax period. For taxable years commencing after December 31, 2007, in the case of sales of business assets, other than sales of tangible personal property sold in the ordinary course of the taxpayer's trade or business, only the net gain from such sales shall be included in the sales factor.