A retailer spends $500 per month to keep its online shop active and updated. The store acquires shirts at a marginal cost of $5 per shirt. Each shirt sells
for a marginal benefit of $10 per shirt.
What is the minimum number of shirts the retailer needs to sell in order to
pay for all its costs in a month?
A. 100
B. 125
C. 25
D. 75

Read the excerpt from david foster wallace’s infinite jest. i have committed to crossing my legs i hope carefully, ankle on knee, hands together in the lap of my slacks. my fingers are mated into a mirrored series of what manifests, to me, as the letter x. the interview room’s other personnel include: the university’s director of composition, its varsity tennis coach, and academy prorector mr. a. delint. c.t. is beside me; the others sit, stand and stand, respectively, at the periphery of my focus. the tennis coach jingles pocket-change. based on this excerpt, which detail is implicit? a.  more chairs are needed to make seating available for all attendees.b.  hal is sitting in a chair with his ankle on his knee.c.  the director of composition is involved in the interview process.d.  the tennis coach has money in his front pocket.