Question

If the government imposes a price floor on wheat at $5 and agrees to purchase any surpluses, how much will the government be forced to spend?

Answer 1

The answer is that the government will be forced to spend $15,000,000.
government imposes a price floor on wheat at $5 
there will be a surplus of $3,000,000
the government will be forced to spend = $5 x $3,000,000 = $15,000,000