Eric, Wesley, Pierre and Michael went shopping with a total of $962. After shopping, they had a total of $182 left. Wesley spent $90. The amount Pierre spent was ³₄ the amount spent by Eric. The total amount spent by Eric and Wesley was $520 less than the total amount spent by Pierre and Michael. How much did Eric and Michael spend altogether?

	Eric	Wesley	Pierre	Michael	Total
Before					$962
Change	- 4 u	- $90	- 3 u	- ?	- $780
After					$182

Total amount that Eric, Wesley, Pierre and Michael spent
= 962 - 182
= $780

Total amount that Eric and Wesley spent
= 4 u + 90

Total amount that Pierre and Michael spent
= 4 u + 90 + 520
= 4 u + 610 

Total amount that Eric, Wesley, Pierre and Michael spent
= 4 u + 90 + 4 u + 610
= 8 u + 700 

8 u + 700 = 780
8 u = 780 - 700
8 u = 80 

1 u = 80 ÷ 8 = 10

Total amount that Wesley and Pierre spent
= 3 u + 90
= 3 x 10 + 90
= 30 + 90
= $120

Total amount that Eric and Michael spent
= 780 - 120
= $660

Answer(s): $660