The usual price of a stapler sold at Shop R and S is $10. During a sale, a discount of 20% is given to every stapler sold at Shop R. At Shop S, a discount of 30% is given to the 6th stapler for every 6 staplers sold. How much cheaper would it be if Usha buys 14 staplers from Shop R instead of Shop S?
|
Shop R |
Shop S |
Price of 1 stapler |
80% $8 |
100% $10 |
Every 6th stapler |
|
70% $7 |
Price of 1 stapler from Shop R in percentage
= 100% - 20%
= 80%
Price of 1 stapler from Shop R at 20% discount
= 80% x 10
=
80100 x 10
= $8
Cost of 14 staplers from Shop R
= 14 x 8
= $112
Price of the 6th stapler from Shop S in percentage
= 100% - 30%
= 70%
Cost of 6th stapler at Shop S
= 70% x 10
=
70100 x 10
= $7
Cost of 1 set of 6 staplers at Shop S
= 10 x 5 + 7
= $57
Number of sets of 6 for staplers at Shop S
= 14 ÷ 6
= 2 r 2
Cost of 2 sets of 6 staplers at Shop S
= 2 x 57
= $114
Cost of 2 staplers at Shop S
= 2 x 7
= $14
Cost of 14 staplers at Shop S
= 114 + 14
= $128
Amount cheaper if Usha buys 14 staplers from Shop R instead of Shop S
= 128 - 112
= $16
Answer(s): $16