Japheth, Bobby, George and Peter went shopping with a total of $853. After shopping, they had a total of $130 left. Bobby spent $10. The amount George spent was ²₃ the amount spent by Japheth. The total amount spent by Japheth and Bobby was $613 less than the total amount spent by George and Peter. How much did Japheth and Peter spend altogether?

	Japheth	Bobby	George	Peter	Total
Before					$853
Change	- 3 u	- $10	- 2 u	- ?	- $723
After					$130

Total amount that Japheth, Bobby, George and Peter spent
= 853 - 130
= $723

Total amount that Japheth and Bobby spent
= 3 u + 10

Total amount that George and Peter spent
= 3 u + 10 + 613
= 3 u + 623 

Total amount that Japheth, Bobby, George and Peter spent
= 3 u + 10 + 3 u + 623
= 6 u + 633 

6 u + 633 = 723
6 u = 723 - 633
6 u = 90 

1 u = 90 ÷ 6 = 15

Total amount that Bobby and George spent
= 2 u + 10
= 2 x 15 + 10
= 30 + 10
= $40

Total amount that Japheth and Peter spent
= 723 - 40
= $683

Answer(s): $683