Simon, Caden, Tim and Fabian went shopping with a total of $589. After shopping, they had a total of $140 left. Caden spent $80. The amount Tim spent was ³₈ the amount spent by Simon. The total amount spent by Simon and Caden was $-15 less than the total amount spent by Tim and Fabian. How much did Simon and Fabian spend altogether?

	Simon	Caden	Tim	Fabian	Total
Before					$589
Change	- 8 u	- $80	- 3 u	- ?	- $449
After					$140

Total amount that Simon, Caden, Tim and Fabian spent
= 589 - 140
= $449

Total amount that Simon and Caden spent
= 8 u + 80

Total amount that Tim and Fabian spent
= 8 u + 80 + -15
= 8 u + 65 

Total amount that Simon, Caden, Tim and Fabian spent
= 8 u + 80 + 8 u + 65
= 16 u + 145 

16 u + 145 = 449
16 u = 449 - 145
16 u = 304 

1 u = 304 ÷ 16 = 19

Total amount that Caden and Tim spent
= 3 u + 80
= 3 x 19 + 80
= 57 + 80
= $137

Total amount that Simon and Fabian spent
= 449 - 137
= $312

Answer(s): $312