RS Corporation, a manufacturer of ethnic foods, contracted in 2020 to purchase 600 pounds of a spice mixture at $3.00 per pound, delivery to be made in spring of 2021. By 12/31/20, the price per pound of the spice mixture had risen to $3.25 per pound. In 2020 , RS should recognize: no gain or loss a loss of $1,800 a loss of $150 a gain of $150