Jenson, Eric, Sam and Harry went shopping with a total of $861. After shopping, they had a total of $128 left. Eric spent $70. The amount Sam spent was ⁴₇ the amount spent by Jenson. The total amount spent by Jenson and Eric was $299 less than the total amount spent by Sam and Harry. How much did Jenson and Harry spend altogether?

	Jenson	Eric	Sam	Harry	Total
Before					$861
Change	- 7 u	- $70	- 4 u	- ?	- $733
After					$128

Total amount that Jenson, Eric, Sam and Harry spent
= 861 - 128
= $733

Total amount that Jenson and Eric spent
= 7 u + 70

Total amount that Sam and Harry spent
= 7 u + 70 + 299
= 7 u + 369 

Total amount that Jenson, Eric, Sam and Harry spent
= 7 u + 70 + 7 u + 369
= 14 u + 439 

14 u + 439 = 733
14 u = 733 - 439
14 u = 294 

1 u = 294 ÷ 14 = 21

Total amount that Eric and Sam spent
= 4 u + 70
= 4 x 21 + 70
= 84 + 70
= $154

Total amount that Jenson and Harry spent
= 733 - 154
= $579

Answer(s): $579