Rosemary has five options for purchasing rolls of paper towels as shown in the table.
Total cost
$1.15
$4.00
$6.80
$8.40
$10.40
Number of Rolls
1
4
8
12
16

Rosemary buys 288 rolls of paper towels during the year. How much money will she save by
purchasing the paper towels with the lowest unit price than the paper towels with the highest
unit price?