Answer:
$8.40
Step-by-step explanation:
divide 22.40 buy how much feet (22.40 divide by 80=0.28) 28cents per foot
0.28 plus the 30 more feet and the 80 feet she already has
80 plus 30 is 110
110 (the amount of feet in cable) times 28 cents a foot is
she will pay 30.80 which is 30.80
-22.40
8 dollars and 40 cents more
