Gwen paid a total of $210 for a cardigan, a pair of socks and a pair of canvas shoes. She spent ²₃ of her money on the pair of socks. The pair of canvas shoes cost 9 times as much as the cardigan. How much more did she pay for the pair of canvas shoes than the cardigan?
Amount that Gwen paid for the pair of socks
= ²₃ x 210 
= $140

Amount that Gwen left after buying the socks
= 210 - 140
= $70

Amount that Gwen paid for the cardigan = 1 u
Amount that Gwen paid for the canvas shoes = 9 u

Total amount spent on the cardigan and the pair of canvas shoes
= 1 u + 9 u
= 10 u

10 u = 70

1 u = 70 ÷ 10 = 7

Amount that Gwen paid more for the pair of canvas shoes than the cardigan
= 9 u - 1 u
= 8 u
= 8 x 7
= $56

Answer(s): $56