An expansion path shows
a. the returns to scale at each level of output.
b. the least-cost combination of inputs for each level of output.
c. the level of sales necessary for a firm if it wants to expand.
d. the level of long-run average cost at different scales of

An electronics store is running a promotion where for every video game purchased, the customer receives a coupon upon checkout to purchase a second game at a 50% discount. the coupons expire in one year. the store normally recognized a gross profit margin of 40% of the selling price on video games. how would the store account for a purchase using the discount coupon?