Amusic store offers a 25% discount on all items in the store .if the original price of a cd is $13,how much will it cost after the discount?

From a party ,lori made a fruit punch from 1 gallon of orange juice ,2 quarts of grape juice,5 pints of pineapple juice,and 12 cups of cranbarry juice order the juice from least to greatest amount used in the fruit punch