The usual price of a notebook sold at Shop F and G is $20. During a sale, a discount of 10% is given to every notebook sold at Shop F. At Shop G, a discount of 30% is given to the 6th notebook for every 6 notebooks sold. How much cheaper would it be if Penelope buys 14 notebooks from Shop F instead of Shop G?
|
Shop F |
Shop G |
Price of 1 notebook |
90% $18 |
100% $20 |
Every 6th notebook |
|
70% $14 |
Price of 1 notebook from Shop F in percentage
= 100% - 10%
= 90%
Price of 1 notebook from Shop F at 10% discount
= 90% x 20
=
90100 x 20
= $18
Cost of 14 notebooks from Shop F
= 14 x 18
= $252
Price of the 6th notebook from Shop G in percentage
= 100% - 30%
= 70%
Cost of 6th notebook at Shop G
= 70% x 20
=
70100 x 20
= $14
Cost of 1 set of 6 notebooks at Shop G
= 20 x 5 + 14
= $114
Number of sets of 6 for notebooks at Shop G
= 14 ÷ 6
= 2 r 2
Cost of 2 sets of 6 notebooks at Shop G
= 2 x 114
= $228
Cost of 2 notebooks at Shop G
= 2 x 14
= $28
Cost of 14 notebooks at Shop G
= 228 + 28
= $256
Amount cheaper if Penelope buys 14 notebooks from Shop F instead of Shop G
= 256 - 252
= $4
Answer(s): $4