Stu owns an ice cream parlor that is usually closed during the winter. This winter, however, Stu is considering opening his business in May instead of June. If Stu opens his store in May, he will earn total revenue of $2,000 for the month, incurring variable costs of $3,500 and fixed costs of $1,500. If the store remains closed during May, Stu will earn no revenues and incur fixed costs of $1,500. Stu should: a) stay closed in May because he will earn a negative economic profit if he opens. b) open in May because he would lose the opportunity of earning $2,000 of total revenue if he remained closed. c) stay closed in May because the loss made by opening and operating exceeds his fixed costs. d) open in May because the $2,000 of total revenue exceeds the $1,500 of fixed costs.