Dylan, Luis, Caden and Flynn went shopping with a total of $754. After shopping, they had a total of $34 left. Luis spent $20. The amount Caden spent was ⁵₇ the amount spent by Dylan. The total amount spent by Dylan and Luis was $470 less than the total amount spent by Caden and Flynn. How much did Dylan and Flynn spend altogether?

	Dylan	Luis	Caden	Flynn	Total
Before					$754
Change	- 7 u	- $20	- 5 u	- ?	- $720
After					$34

Total amount that Dylan, Luis, Caden and Flynn spent
= 754 - 34
= $720

Total amount that Dylan and Luis spent
= 7 u + 20

Total amount that Caden and Flynn spent
= 7 u + 20 + 470
= 7 u + 490 

Total amount that Dylan, Luis, Caden and Flynn spent
= 7 u + 20 + 7 u + 490
= 14 u + 510 

14 u + 510 = 720
14 u = 720 - 510
14 u = 210 

1 u = 210 ÷ 14 = 15

Total amount that Luis and Caden spent
= 5 u + 20
= 5 x 15 + 20
= 75 + 20
= $95

Total amount that Dylan and Flynn spent
= 720 - 95
= $625

Answer(s): $625