Bob is a wheat farmer, but also likes to give fiddle lessons. One spring day, Bob faces a choice: spend ten hours planting wheat or spend ten hours giving fiddling lessons. Suppose Farmer Bob charges $35 per hour for his fiddle lessons. Suppose further that, in ten hours, Bob can plant $280 worth of seeds that he expects will yield $600 worth of wheat. (Assume there are no other costs involved with either activity.) After breakfast, Bob decided to spend the day planting. What is the explicit cost Farmer Bob incurred from his ten hours of planting seeds?

Select one:

A.$0.

B.$35.

C.$250.

D.$280.

E.$315.

F.$320.

G.$350.

H.$600.

I.$630.