When Farmer Hoglund Applies N Pounds of Fertilizer Per Acre

When Farmer Hoglund applies N pounds of fertilizer per acre, the marginal product of fertilizer is 1 - bushels of corn. If the price of corn is $4 per bushel and the price of fertilizer is $1.20 per pound, then how many pounds of fertilizer per acre should Farmer Hoglund use in order to maximize his profits?

A) 140
B) 280
C) 74
D) 288
E) 200