Mary paid a total of $216 for a cardigan, a pair of socks and a pair of canvas shoes. She spent ²₉ of her money on the pair of socks. The pair of canvas shoes cost 6 times as much as the cardigan. How much more did she pay for the pair of canvas shoes than the cardigan?
Amount that Mary paid for the pair of socks
= ²₉ x 216 
= $48

Amount that Mary left after buying the socks
= 216 - 48
= $168

Amount that Mary paid for the cardigan = 1 u
Amount that Mary paid for the canvas shoes = 6 u

Total amount spent on the cardigan and the pair of canvas shoes
= 1 u + 6 u
= 7 u

7 u = 168

1 u = 168 ÷ 7 = 24

Amount that Mary paid more for the pair of canvas shoes than the cardigan
= 6 u - 1 u
= 5 u
= 5 x 24
= $120

Answer(s): $120