John, Riordan, Caden and Flynn went shopping with a total of $761. After shopping, they had a total of $143 left. Riordan spent $40. The amount Caden spent was ⁴₇ the amount spent by John. The total amount spent by John and Riordan was $286 less than the total amount spent by Caden and Flynn. How much did John and Flynn spend altogether?

	John	Riordan	Caden	Flynn	Total
Before					$761
Change	- 7 u	- $40	- 4 u	- ?	- $618
After					$143

Total amount that John, Riordan, Caden and Flynn spent
= 761 - 143
= $618

Total amount that John and Riordan spent
= 7 u + 40

Total amount that Caden and Flynn spent
= 7 u + 40 + 286
= 7 u + 326 

Total amount that John, Riordan, Caden and Flynn spent
= 7 u + 40 + 7 u + 326
= 14 u + 366 

14 u + 366 = 618
14 u = 618 - 366
14 u = 252 

1 u = 252 ÷ 14 = 18

Total amount that Riordan and Caden spent
= 4 u + 40
= 4 x 18 + 40
= 72 + 40
= $112

Total amount that John and Flynn spent
= 618 - 112
= $506

Answer(s): $506