Harry bought 5 non-fiction books. The original price of each non-fiction book was $36. He was given 10% discount on the first non-fiction book and 25% discount on the rest of the non-fiction books. How much did he pay for the 5 non-fiction books altogether?
Cost of the first non-fiction book after 10% discount in percent
= 100% - 10%
= 90%
Cost of the first non-fiction book after discount
= 90% x 36
=
90100 x 36
= $32.40
Number of the rest of the non-fiction books that enjoyed 25% discount
= 5 - 1
= 4
Cost of each of the rest of the 4 non-fiction books after 25% discount in percent
= 100% - 25%
= 75%
Cost of each of the rest of the 4 non-fiction books
= 75% x 36
=
75100 x 36
= $27
Cost of the rest of the 4 non-fiction books that enjoyed 25% discount
= 4 x 27
= $108
Total cost for the 5 non-fiction books
= 32.40 + 108
= $140.40
Answer(s): $140.40