The usual price of a notebook sold at Shop H and J is $20. During a sale, a discount of 20% is given to every notebook sold at Shop H. At Shop J, a discount of 30% is given to the 4th notebook for every 4 notebooks sold. How much cheaper would it be if Elyse buys 14 notebooks from Shop H instead of Shop J?

	Shop H	Shop J
Price of 1 notebook	80%  $16	100% $20
Every 4th notebook		70% $14

Price of 1 notebook from Shop H in percentage
= 100% - 20%
= 80%

Price of 1 notebook from Shop H at 20% discount
= 80% x 20
= ⁸⁰₁₀₀ x 20 
= $16

Cost of 14 notebooks from Shop H
= 14 x 16
= $224

Price of the 4th notebook from Shop J in percentage
= 100% - 30%
= 70%

Cost of 4th notebook at Shop J
= 70% x 20
= ⁷⁰₁₀₀ x 20 
= $14

Cost of 1 set of 4 notebooks at Shop J
= 20 x 3 + 14
= $74

Number of sets of 4 for notebooks at Shop J
= 14 ÷ 4
= 3 r 2

Cost of 3 sets of 4 notebooks at Shop J
= 3 x 74
= $222

Cost of 2 notebooks at Shop J
= 2 x 14
= $28

Cost of 14 notebooks at Shop J
= 222 + 28
= $250

Amount cheaper if Elyse buys 14 notebooks from Shop H instead of Shop J
= 250 - 224
= $26

Answer(s): $26