Answer: Selling price = $201.39.
Step-by-step explanation: We are given the cost of a stereo = $125.39.
The price is marked up of the original cost is = $76.00.
Please note: We mark up means adding the value of mark up to the original cost.
Therefore,
Selling price = Original cost + Mark up value
Plugging values of Original cost and Mark up value in above formula, we get
Selling price = 125.39 + 76.00.
Selling price = $201.39.