Check my work Modern Artifacts can produce keepsakes that will be sold for $40 each. Nondepreciation fixed costs are $500 per yeat, and variable costs are $30 per unit. The initial investment of $1,800 will be depreciated straight line over its useful life of 6 years to a final value of zero, and the discount rate is 8% a. What is the degree of operating leverage of Modern Artifacts when sales are $4,000? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Degree of operating leverage b. What is the degree of operating leverage when sales are $7,360? (Do not round Intermediate calculations. Round your answer to 2 decimal places.) Degree of operating everage c. Why is operating leverage different at these two levels of sales? Degree of operating levetage is When profits are