Billy bought 5 novels. The original price of each novel was $32. He was given 20% discount on the first novel and 25% discount on the rest of the novels. How much did he pay for the 5 novels altogether?
Cost of the first novel after 20% discount in percent
= 100% - 20%
= 80%

Cost of the first novel after discount
= 80% x 32
= ⁸⁰₁₀₀ x 32
= $25.60

Number of the rest of the novels that enjoyed 25% discount
= 5 - 1
= 4

Cost of each of the rest of the 4 novels after 25% discount in percent
= 100% - 25%
= 75%

Cost of each of the rest of the 4 novels
= 75% x 32
= ⁷⁵₁₀₀ x 32
= $24

Cost of the rest of the 4 novels that enjoyed 25% discount
= 4 x 24 
= $96

Total cost for the 5 novels
= 25.60 + 96
= $121.60

Answer(s): $121.60