If MrHoward Paid $2,500 Per Acre for the W 1/2 of of the SE

If Mr.Howard paid $2,500 per acre for the W 1/2 of the SE 1/4 of the NW 1/4 of section 10, how much did he pay?

A) $50,000
B) $100,000
C) $200,000
D) $680,000