An investor purchases a futures contract on $8,000$ bushels of sorghum at $$6\mathrm{.}00$ per bushel. If the spot price of sorghum at the settlement of the contract is $$6\mathrm{.}50,$ how much will the investor make or lose on the $8,000$ bushels?

a$.$

$$(4,800)$

b$.$

$$4,800$

c$.$

$$8,000$

d$.$

$$4,000$