Given:
Truck average=20 miles per gallon.
Required:
Cost in dollars
Step-by-step explanation:
First of all we are going to divide 320 miles with 20 miles to calculate the average per gallon.

Logan's truck average =16 miles.
Now to calculate the price of gasoline in dollars
we have to multiply our calculates miles with the price of gasoline in dollars
which is equal to=

Required answer:
16 miles , 32 dollars