Answer:
$975
Explanation:
The car is rented for 3 weeks
the rent is for a week is $280 so for three weeks it would be
3*28 = $840
now we need to add the per mile price to this
1 mile = $0.15 for 900 miles it would be
900*(0.15) = 135
So the total rental cost is
$840 + $135 = $975