quick questions

please show your work.

Question 18 --/4 An item costs $800 and has a markup percent of 40% based on the selling price. Find the selling price. . Question 19 --/ 4 An item has a selling price of $520 and a cost of $383. Find the markup percentage based on the selling price. A Question 20 -14 An item has a selling price of $225 and a cost of $120. Find the markup percentage if it is based on cost. Question 15 .-14 An item costs $200 and has a markup percentage of 20% based on cost. Find the selling price. Type your answer Question 16 -- / 4 An item has a selling price of $260 and a markup percentage of 60% based on cost. Find the cost of the item