Tiffany paid a total of $110 for a cardigan, a pair of socks and a pair of slippers. She spent ⁶₁₁ of her money on the pair of socks. The pair of slippers cost 9 times as much as the cardigan. How much more did she pay for the pair of slippers than the cardigan?
Amount that Tiffany paid for the pair of socks
= ⁶₁₁ x 110 
= $60

Amount that Tiffany left after buying the socks
= 110 - 60
= $50

Amount that Tiffany paid for the cardigan = 1 u
Amount that Tiffany paid for the slippers = 9 u

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

10 u = 50

1 u = 50 ÷ 10 = 5

Amount that Tiffany paid more for the pair of slippers than the cardigan
= 9 u - 1 u
= 8 u
= 8 x 5
= $40

Answer(s): $40