Cole, Bryan, Ben and Charlie went shopping with a total of $758. After shopping, they had a total of $46 left. Bryan spent $30. The amount Ben spent was ⁴₅ the amount spent by Cole. The total amount spent by Cole and Bryan was $552 less than the total amount spent by Ben and Charlie. How much did Cole and Charlie spend altogether?

	Cole	Bryan	Ben	Charlie	Total
Before					$758
Change	- 5 u	- $30	- 4 u	- ?	- $712
After					$46

Total amount that Cole, Bryan, Ben and Charlie spent
= 758 - 46
= $712

Total amount that Cole and Bryan spent
= 5 u + 30

Total amount that Ben and Charlie spent
= 5 u + 30 + 552
= 5 u + 582 

Total amount that Cole, Bryan, Ben and Charlie spent
= 5 u + 30 + 5 u + 582
= 10 u + 612 

10 u + 612 = 712
10 u = 712 - 612
10 u = 100 

1 u = 100 ÷ 10 = 10

Total amount that Bryan and Ben spent
= 4 u + 30
= 4 x 10 + 30
= 40 + 30
= $70

Total amount that Cole and Charlie spent
= 712 - 70
= $642

Answer(s): $642