Answer:
$104.56
Explanation:
The computation of the cost of the road trip as follows:
The total number of gallons required is 
 = 568 ÷ 21 miles 
= 27.05 gallons. 
 Now 
the cost of one gallon is 
= 3.79 × 1.02 
= $3.8658 
 So, the cost of the road trip is 
= 27.05 × 3.8658 
= $104.56