There were 490 T-shirts at a boutique. ³₇ of them were with collars. T-shirts with collars were priced at $6 each. T-shirts without collars were priced at $3 each. The boutique owner sold ²₃ of the T-shirts with collars and ⁴₅ of the T-shirts without collars. How much did he collect from all the T-shirts he sold?
Number of T-shirts = 7 u

7 u = 490

1 u = 490 ÷ 7 = 70

Number of T-shirts with collars
= 3 u
= 3 x 70
= 210

Number of T-shirts with collars sold 
= ²₃ x 210
= 140

Number of T-shirts without collars
= 4 u
= 4 x 70
= 280

Number of T-shirts without collars sold
= ⁴₅ x 280
= 224

Amount that the boutique owner collected from the sale of the T-shirts with collars
= 140 x 6
= $840

Amount that the boutique owner collected from the sale of the T-shirts without collars
= 224 x 3
= $672

Total amount that the boutique owner collected from all the T-shirts he sold
= 840 + 672
= $1512

Answer(s): $1512