Answer:
C . $146.43
Explanation:
lets use variables
dolls = d
remote cars = r
create an equation for the cost of dolls :
3 * 19.99 = $59.97
Create an equation for the cost of the remote cars
4 * 21.99 = $ 87.96
since there was a discount for each car bought, deduct from total cost
$87.96 - 4*3 = $75.96
now add the cost of the dolls and cars as well as the shipping cost :
59.97 + 75.96 + 10.5
= $ 146.43