Need math wizzo's?

Question

my truck has like a 22-24 gal tank (i think). figuring gas $5.00 a gal ( to be on safe side) and i am traveling about 500 miles, how much would it run me to go totaling 1,000 miles? it only gets 18 mpg.

Answer 1

1000 miles at 18 mpg = 56 gallons times $5.00 = $280

but it beats walking.