please answer all and process

Problem 5 (55 Points 2 parts): (You must show your work for credit.) PART A (30 pts.): Riley Corporation produces and sells a single product. Data concerning that product appear below: Selling price per unit Variable expense per unit Fixed expenses $6001 $360 $1,122,000 Required: (You must show your work.) a. How many units must Riley sell to break even? (5 pts.) b. What is Riley's breakeven sales in dollars? (5 pts.) and c. If Riley had total sales of $3,300,000, what is the margin of safety in units dollars _? (10 pts.) d. If Riley desires a profit of $600,000, it would need to sell _? (10 pts.) units resulting in total sales of