I am stuck and I need help

5. A table costs $75 to produce. If the manufacturer allows 35% of cost for overhead expenses and sells the table for $112.50: a. How much is the markup? b. How much is the net profit? 6. A pair of shoes costs $18.50 to manufacture. If 40% of the selling price is allowed for net profit and the merchandise is sold for $60: a. Find the markup; b. How much are overhead expenses? 7. A producer allows 13% of cost for overhead expenses and 20% of cost for net profit. What percent of cost is his markup