Japheth spent ²₅ of his salary and gave $780 to his wife. Of the remaining amount, he saved ¹₄ of it and gave ⁴₉ of it to his sisters. He then donated ²₃ of what he had left away and gave the remaining $20 to his daughter. What was Japheth's salary?

Spent	Wife	Saved	Sisters	Donated	Daughter	Total
2 u	3 u					5 u
	$780	1 p	3 p
			4x3	5x3
				2x5	1x5
			12 b	10 b	5 b $20

Amount that his daughter received = 5 b

5 b = 20
1 b = 20 ÷ 5 = 4

Amount of his salary given to his sisters, his donations and his daughter
= 12 b + 10 b + 5 b
= 27 b
= 27 x 4
= $108

3 p = 108 
1 p = 108 ÷ 3 = 36

Amount of his salary given to his savings, his sisters, his donations and his daughter
= 1 p + 3 p
= 4 p
= 4 x 36
= $144

Amount of his salary given to his wife, his savings, his sisters, his donations and his daughter
= 780 + 144
= $924 

3 u = 924 
1 u = 924 ÷ 3 = 308

Japheth's salary
= 5 u
= 5 x 308
= $1540

Answer(s): $1540