There were 720 T-shirts at a boutique. ³₈ of them were with collars. T-shirts with collars were priced at $3 each. T-shirts without collars were priced at $9 each. The boutique owner sold ¹₆ 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 = 720

1 u = 720 ÷ 8 = 90

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

Number of T-shirts with collars sold 
= ¹₆ x 270
= 45

Number of T-shirts without collars
= 5 u
= 5 x 90
= 450

Number of T-shirts without collars sold
= ²₃ x 450
= 300

Amount that the boutique owner collected from the sale of the T-shirts with collars
= 45 x 3
= $135

Amount that the boutique owner collected from the sale of the T-shirts without collars
= 300 x 9
= $2700

Total amount that the boutique owner collected from all the T-shirts he sold
= 135 + 2700
= $2835

Answer(s): $2835