Kitty Corner

Question

Pet supplies: Cat Food - $0.33 per can, Cat treats - $1.49 per bag, Cat toys - $2.29 each, Litter - $3.89 per bag, Exercise wheel - $5.69.

Nicki and her brother Lee went shopping to buy supplies for their cat. Lee contributed $5.00. Nicki brought all the money she'd earned that week to cover the rest of the cost.

They bought 3 bags of litter, 10 cans of cat food, and 2 bags of cat treats.
They returned a hamster exercise wheel and got a credit of $5.69 to help pay for the cat supplies.
After they made their purchases, they had $2.74 left.

How much money had Nicki earned that week?