a. 5. A building supply store prices all products to give a one third (33.33%) margin. What rate of markup do they use? b. If the company had profits of $500,000 what was their cost of goods sold? If operating expenses are 10% of sales what is the percent net profit? d. A mitre saw had a cost of $100 what was the selling price? A pressure washer which costs $120 was sold after being marked down 20%- what was the selling price? What was the percent margin? C. e