Answer
The price should be 40 dollars.
Work Step by Step
Let s represent the selling price. The basic relationship is: selling price equals cost plus profit.
Selling price = Cost + Profit
Selling price = s
Cost = 28
Profit = 30% of the selling price = 30% $\times$ s = 0.3s
So,
s = 28 + 0.3s
0.7s = 28
Divide both sides by 0.7
s = 40
The price should be 40 dollars.
