Gabe can buy T-shirts in packs of 5 for $8.55 or in packs of 2 for $4.82. How much money does he save by buying 30 T-shirts at the better price?

Cost Per T-Shirt (Packs of 5) = $8.55 : 5 = $1.71

Cost Per T-Shirt (Packs of 2) = $4.82 : 2 = $2.41

From here we can know Packs of 5 will give you a better deal.

Cost of 30 T-Shirts (Packs of 5) = $1.71 x 30 = $51.30

Cost of 30 T-Shirts (Packs of 2) = $2.41 x 30 = $72.30

Savings (Difference) = $72.30 - $51.30 = $21

If he buys 30 t - shirts of the packs of 5 for 8.55 the total cost will be $51.30. If he buys 30 t-shirts of 2 for 4.82 the total coast will be $72.3. The better price is the first choice and he will save $21.00.