The usual price of a stapler sold at Shop G and H is $40. During a sale, a discount of 20% is given to every stapler sold at Shop G. At Shop H, a discount of 30% is given to the 4th stapler for every 4 staplers sold. How much cheaper would it be if Joelle buys 11 staplers from Shop G instead of Shop H?

	Shop G	Shop H
Price of 1 stapler	80%  $32	100% $40
Every 4th stapler		70% $28

Price of 1 stapler from Shop G in percentage
= 100% - 20%
= 80%

Price of 1 stapler from Shop G at 20% discount
= 80% x 40
= ⁸⁰₁₀₀ x 40 
= $32

Cost of 11 staplers from Shop G
= 11 x 32
= $352

Price of the 4th stapler from Shop H in percentage
= 100% - 30%
= 70%

Cost of 4th stapler at Shop H
= 70% x 40
= ⁷⁰₁₀₀ x 40 
= $28

Cost of 1 set of 4 staplers at Shop H
= 40 x 3 + 28
= $148

Number of sets of 4 for staplers at Shop H
= 11 ÷ 4
= 2 r 3

Cost of 2 sets of 4 staplers at Shop H
= 2 x 148
= $296

Cost of 3 staplers at Shop H
= 3 x 28
= $84

Cost of 11 staplers at Shop H
= 296 + 84
= $380

Amount cheaper if Joelle buys 11 staplers from Shop G instead of Shop H
= 380 - 352
= $28

Answer(s): $28