Shiyun sold $620 worth of dresses and coats. She earned $80 less on the coats than the dresses. Each coat is sold for $8 more than each dress. The number of coats sold was ³₇ of the number of dresses sold.

1. How much did Shiyun earn from the sales of the dresses?
2. How many dresses were sold?

(a)
Amount that Shiyun earned from the sales of the dresses
= (620 + 80) ÷ 2
= 700 ÷ 2
= $350 

(b)
Amount that Shiyun earned from the sales of the coats
= 350 - 80
= $270

Number of sets of coats sold = 3  
Number of sets of dresses sold = 7

Cost of 1 set of coats sold
= 270 ÷ 3
= $90

Cost of 1 set of dresses sold
= 350 ÷ 7
= $50

Amount that 1 set of coats was more than 1 set of dresses 
= 90 - 50
= $40

Number of items in 1 set
= 40 ÷ 8
= 5

Number of dresses sold
= 7 x 5
= 35

Answer(s): (a) $350 ; (b) 35