Michael, Ethan, Daniel and Lee went shopping with a total of $894. After shopping, they had a total of $139 left. Ethan spent $90. The amount Daniel spent was ⁴₅ the amount spent by Michael. The total amount spent by Michael and Ethan was $375 less than the total amount spent by Daniel and Lee. How much did Michael and Lee spend altogether?

	Michael	Ethan	Daniel	Lee	Total
Before					$894
Change	- 5 u	- $90	- 4 u	- ?	- $755
After					$139

Total amount that Michael, Ethan, Daniel and Lee spent
= 894 - 139
= $755

Total amount that Michael and Ethan spent
= 5 u + 90

Total amount that Daniel and Lee spent
= 5 u + 90 + 375
= 5 u + 465 

Total amount that Michael, Ethan, Daniel and Lee spent
= 5 u + 90 + 5 u + 465
= 10 u + 555 

10 u + 555 = 755
10 u = 755 - 555
10 u = 200 

1 u = 200 ÷ 10 = 20

Total amount that Ethan and Daniel spent
= 4 u + 90
= 4 x 20 + 90
= 80 + 90
= $170

Total amount that Michael and Lee spent
= 755 - 170
= $585

Answer(s): $585