There were 450 T-shirts at a stall. ³₅ of them were with collars. T-shirts with collars were priced at $9 each. T-shirts without collars were priced at $10 each. The stall owner sold ¹₃ of the T-shirts with collars and ⁸₉ of the T-shirts without collars. How much did he collect from all the T-shirts he sold?
Number of T-shirts = 5 u

5 u = 450

1 u = 450 ÷ 5 = 90

Number of T-shirts with collars
= 3 u
= 3 x 90
= 270

Number of T-shirts with collars sold 
= ¹₃ x 270
= 90

Number of T-shirts without collars
= 2 u
= 2 x 90
= 180

Number of T-shirts without collars sold
= ⁸₉ x 180
= 160

Amount that the stall owner collected from the sale of the T-shirts with collars
= 90 x 9
= $810

Amount that the stall owner collected from the sale of the T-shirts without collars
= 160 x 10
= $1600

Total amount that the stall owner collected from all the T-shirts he sold
= 810 + 1600
= $2410

Answer(s): $2410