The usual price of a stapler sold at Shop J and K is $16. During a sale, a discount of 25% is given to every stapler sold at Shop J. At Shop K, a discount of 50% is given to the 6th stapler for every 6 staplers sold. How much cheaper would it be if Wendy buys 16 staplers from Shop J instead of Shop K?

	Shop J	Shop K
Price of 1 stapler	75%  $12	100% $16
Every 6th stapler		50% $8

Price of 1 stapler from Shop J in percentage
= 100% - 25%
= 75%

Price of 1 stapler from Shop J at 25% discount
= 75% x 16
= ⁷⁵₁₀₀ x 16 
= $12

Cost of 16 staplers from Shop J
= 16 x 12
= $192

Price of the 6th stapler from Shop K in percentage
= 100% - 50%
= 50%

Cost of 6th stapler at Shop K
= 50% x 16
= ⁵⁰₁₀₀ x 16 
= $8

Cost of 1 set of 6 staplers at Shop K
= 16 x 5 + 8
= $88

Number of sets of 6 for staplers at Shop K
= 16 ÷ 6
= 2 r 4

Cost of 2 sets of 6 staplers at Shop K
= 2 x 88
= $176

Cost of 4 staplers at Shop K
= 4 x 8
= $32

Cost of 16 staplers at Shop K
= 176 + 32
= $208

Amount cheaper if Wendy buys 16 staplers from Shop J instead of Shop K
= 208 - 192
= $16

Answer(s): $16