Final answer:
The correct way to find the total cost of sales in this case is option B, which is $75,000. You need to add the returns to the sales and then apply the markup percentage.
Step-by-step explanation:
The correct way to find the total cost of sales in this case is option B, which is $75,000. To calculate the total cost of sales, you need to add the returns to the sales and then apply the markup percentage. In this example, the sales were $100,000, the sales return was $10,000, and the markup percentage was 50%. So, adding the returns to the sales would give us $100,000 + $10,000 = $110,000. Then, applying the markup of 50% to $110,000 we get $110,000 x 50% = $55,000. Finally, adding the markup to the sales return gives us $55,000 + $10,000 = $75,000.