I need help plss! thank you The table shows the cost of renting a sound system for a concert. Isabel rents a sound system at 1 P. M. and plans to return it before 4 P. M.

Hours Rented, x Cost ($), f(x)
0 < x ≤ 1 24
1 < x ≤ 2 48
2 < x ≤ 3 60
3 < x ≤ 4 72

Complete by entering a number in each box.

Isabel will pay $
if she returns the system between 3 and 4 P. M.

If she is 30 minutes late, she will pay an additional $
.