Oscar spent ²₅ of his salary and gave $732 to his wife. Of the remaining amount, he saved ¹₄ of it and gave ³₁₀ of it to his grandparents. He then donated ²₃ of what he had left away and gave the remaining $21 to his son. What was Oscar's salary?

Spent	Wife	Saved	Grandparents	Donated	Son	Total
2 u	3 u					5 u
	$732	1 p	3 p
			3x3	7x3
				2x7	1x7
			9 b	14 b	7 b $21

Amount that his son received = 7 b

7 b = 21
1 b = 21 ÷ 7 = 3

Amount of his salary given to his grandparents, his donations and his son
= 9 b + 14 b + 7 b
= 30 b
= 30 x 3
= $90

3 p = 90 
1 p = 90 ÷ 3 = 30

Amount of his salary given to his savings, his grandparents, his donations and his son
= 1 p + 3 p
= 4 p
= 4 x 30
= $120

Amount of his salary given to his wife, his savings, his grandparents, his donations and his son
= 732 + 120
= $852 

3 u = 852 
1 u = 852 ÷ 3 = 284

Oscar's salary
= 5 u
= 5 x 284
= $1420

Answer(s): $1420