There were 360 T-shirts at a boutique. ³₄ of them were with collars. T-shirts with collars were priced at $12 each. T-shirts without collars were priced at $6 each. The boutique owner sold ¹₂ of the T-shirts with collars and ⁷₉ of the T-shirts without collars. How much did he collect from all the T-shirts he sold?
Number of T-shirts = 4 u

4 u = 360

1 u = 360 ÷ 4 = 90

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

Number of T-shirts with collars sold 
= ¹₂ x 270
= 135

Number of T-shirts without collars
= 1 u
= 1 x 90
= 90

Number of T-shirts without collars sold
= ⁷₉ x 90
= 70

Amount that the boutique owner collected from the sale of the T-shirts with collars
= 135 x 12
= $1620

Amount that the boutique owner collected from the sale of the T-shirts without collars
= 70 x 6
= $420

Total amount that the boutique owner collected from all the T-shirts he sold
= 1620 + 420
= $2040

Answer(s): $2040