John wants to buy a new computer that
costs $3,280. He decides to use his own car
and hire out as a taxi during the four
months of summer. It costs him $693 to
insure his car for those four months. He
spends $452 per month on gas. Assuming!
no other expenses, how many fares will he
have to get before he earns enough money
for the computer, if he charges an average
of $7 per fare?
(A) 450
(B) 583
(C) 826
(D) 927