Concept:Gross profit percentage shows the portion of sales left after paying for the cost of goods sold.Explanation:Gross profit is calculated as sales minus cost of goods sold.Therefore, gross profit =18,600−11,500=7,100.Gross profit percentage =SalesGross profit×100.So, gross profit percentage =18,6007,100×100=38.17%.Answer:The correct answer is option B: 38.17%.