Michael, Glen, Howard and Valen went shopping with a total of $915. After shopping, they had a total of $197 left. Glen spent $10. The amount Howard spent was ²₃ the amount spent by Michael. The total amount spent by Michael and Glen was $536 less than the total amount spent by Howard and Valen. How much did Michael and Valen spend altogether?

	Michael	Glen	Howard	Valen	Total
Before					$915
Change	- 3 u	- $10	- 2 u	- ?	- $718
After					$197

Total amount that Michael, Glen, Howard and Valen spent
= 915 - 197
= $718

Total amount that Michael and Glen spent
= 3 u + 10

Total amount that Howard and Valen spent
= 3 u + 10 + 536
= 3 u + 546 

Total amount that Michael, Glen, Howard and Valen spent
= 3 u + 10 + 3 u + 546
= 6 u + 556 

6 u + 556 = 718
6 u = 718 - 556
6 u = 162 

1 u = 162 ÷ 6 = 27

Total amount that Glen and Howard spent
= 2 u + 10
= 2 x 27 + 10
= 54 + 10
= $64

Total amount that Michael and Valen spent
= 718 - 64
= $654

Answer(s): $654