Nick spent $1690 on sweaters and skirts. The number of skirts he bought was ¹₂ the number of sweaters he bought. The cost of a skirt was $7 more than the cost of a sweater. He paid $470 more on sweaters than on skirts. Find the cost of 7 sweaters and 9 skirts.

	Sweaters	Skirts
Number of sets	2 sets	1 set
Compare each		$7 more
Total value	$1080	$610

Total cost of skirts
= (1690 - 470) ÷ 2
= $610

Total cost of sweaters
= 610 + 470
= $1080

2 sets of sweaters = $1080
1 set of sweaters = 1080 ÷ 2 = $540 

1 set of skirts = $610

Difference in 1 set of skirts and 1 set of sweaters
= 610 - 540
= $70

Number of clothing in 1 set
= 70 ÷ 7
= 10

Cost of 1 sweater
= 540 ÷ 10
= $54

Cost of 1 skirt
= 54 + 7
= $61

Price of 7 sweaters and 9 skirts
= (7 x 54) + (9 x 61)
= 378 + 549
= $927

Answer(s): $927