Modern Artifacts can produce keepsakes that will be sold for $87 each. Nondepreciation fixed costs are $1,700 per year, and variable costs are $60 per unit. The initial investment of $3,100 will be depreciated straight-line over its useful life of five years to a final value of zero, and the discount rate is 10%. a. What is the degree of operating leverage of Modern Artifacts when sales are $8,265 ? (Round your answer to 1 decimal place.) b. What is the degree of operating leverage when sales are $13,485 ? (Round your answer to 1 decimal place.)