There were 480 T-shirts at a store. ³₈ of them were with collars. T-shirts with collars were priced at $9 each. T-shirts without collars were priced at $7 each. The store owner sold ¹₅ of the T-shirts with collars and ²₃ of the T-shirts without collars. How much did he collect from all the T-shirts he sold?
Number of T-shirts = 8 u

8 u = 480

1 u = 480 ÷ 8 = 60

Number of T-shirts with collars
= 3 u
= 3 x 60
= 180

Number of T-shirts with collars sold 
= ¹₅ x 180
= 36

Number of T-shirts without collars
= 5 u
= 5 x 60
= 300

Number of T-shirts without collars sold
= ²₃ x 300
= 200

Amount that the store owner collected from the sale of the T-shirts with collars
= 36 x 9
= $324

Amount that the store owner collected from the sale of the T-shirts without collars
= 200 x 7
= $1400

Total amount that the store owner collected from all the T-shirts he sold
= 324 + 1400
= $1724

Answer(s): $1724