Oliver, Vaidev, Sam and Cody went shopping with a total of $811. After shopping, they had a total of $94 left. Vaidev spent $70. The amount Sam spent was ²₅ the amount spent by Oliver. The total amount spent by Oliver and Vaidev was $377 less than the total amount spent by Sam and Cody. How much did Oliver and Cody spend altogether?

	Oliver	Vaidev	Sam	Cody	Total
Before					$811
Change	- 5 u	- $70	- 2 u	- ?	- $717
After					$94

Total amount that Oliver, Vaidev, Sam and Cody spent
= 811 - 94
= $717

Total amount that Oliver and Vaidev spent
= 5 u + 70

Total amount that Sam and Cody spent
= 5 u + 70 + 377
= 5 u + 447 

Total amount that Oliver, Vaidev, Sam and Cody spent
= 5 u + 70 + 5 u + 447
= 10 u + 517 

10 u + 517 = 717
10 u = 717 - 517
10 u = 200 

1 u = 200 ÷ 10 = 20

Total amount that Vaidev and Sam spent
= 2 u + 70
= 2 x 20 + 70
= 40 + 70
= $110

Total amount that Oliver and Cody spent
= 717 - 110
= $607

Answer(s): $607