gross profit percentage
(2) Gross profit percentage (A) In general The term “gross profit percentage” means the percent which— (i) the excess of the aggregate sales price of property sold by the employer to customers over the aggregate cost of such property to the employer, is of (ii) the aggregate sale price of such property. (B) Determination of gross profit percentage Gross profit percentage shall be determined on the basis of— (i) all property offered to customers in the ordinary course of the line of business of the employer in which the employee is performing services (or a reasonable classification of property selected by the employer), and (ii) the employer’s experience during a representative period.