Mark spent ²₅ of his salary and gave $1289 to his wife. Of the remaining amount, he saved ¹₄ of it and gave ³₁₀ of it to his sisters. He then donated ²₃ of what he had left away and gave the remaining $28 to his son. What was Mark's salary?

Spent	Wife	Saved	Sisters	Donated	Son	Total
2 u	3 u					5 u
	$1289	1 p	3 p
			3x3	7x3
				2x7	1x7
			9 b	14 b	7 b $28

Amount that his son received = 7 b

7 b = 28
1 b = 28 ÷ 7 = 4

Amount of his salary given to his sisters, his donations and his son
= 9 b + 14 b + 7 b
= 30 b
= 30 x 4
= $120

3 p = 120 
1 p = 120 ÷ 3 = 40

Amount of his salary given to his savings, his sisters, his donations and his son
= 1 p + 3 p
= 4 p
= 4 x 40
= $160

Amount of his salary given to his wife, his savings, his sisters, his donations and his son
= 1289 + 160
= $1449 

3 u = 1449 
1 u = 1449 ÷ 3 = 483

Mark's salary
= 5 u
= 5 x 483
= $2415

Answer(s): $2415