The selling price equals the original cost plus the profit. Let's show this with variables:S = C + P
You also know that the profit it 35% of the cost. That means:P = 35%C
Now you can substitute this expression for P into the first equation:S = C + (35%C)
You know S = $670, so now you just need to solve the equation for C. I'm pretty sure you can handle it from here, Charlie.
Stephen La Rocque. >