4. Sacks Co. manufactures mobile cellular equipment and develops a price for the product by using a variable cost concept. Sacks incurs variable costs of $1,900,000 in the production of 100,000 units Fixed costs total $50,000. The company employs $4,725,000 of assets and wishes to can a profit equal to a 10% rate ofretum on assets. (a) Compute a markup percentage based on variable cost (b) Determine a selling price