You can
put this solution on YOUR website!Let x = cost.
.35x = profit
Cost + Profit = Selling price
x + .35x = 670
1.00 + .35x = 670
1.35x = 670
Divide both sides by 1.35:
x= 670/1.35= $496.30 approximately
It usually comes out more even than this, but such is life sometimes. I still think it is correct.
R^2 at SCC