Opal sold $1834 worth of sweaters and jumpsuits. She earned $616 less on the jumpsuits than the sweaters. Each jumpsuit is sold for $4 more than each sweater. The number of jumpsuits sold was ³₇ of the number of sweaters sold.

1. How much did Opal earn from the sales of the sweaters?
2. How many jumpsuits were sold?

(a)
Amount that Opal earned from the sales of the sweaters
= (1834 + 616) ÷ 2
= 2450 ÷ 2
= $1225 

(b)
Amount that Opal earned from the sales of the jumpsuits
= 1225 - 616
= $609

Number of sets of jumpsuits sold = 3  
Number of sets of sweaters sold = 7

Cost of 1 set of jumpsuits sold
= 609 ÷ 3
= $203

Cost of 1 set of sweaters sold
= 1225 ÷ 7
= $175

Amount that 1 set of jumpsuits was more than 1 set of sweaters 
= 203 - 175
= $28

Number of items in 1 set
= 28 ÷ 4
= 7

Number of jumpsuits sold
= 3 x 7
= 21

Answer(s): (a) $1225 ; (b) 21