Modern Artifacts can produce keepsakes that will be sold for $$130$ each. Nondepreciation fixed costs are $$2,000$ per year, and variable costs are $$80$ per unit. The initial investment of $$6,000$ will be depreciated straight$-$line over its useful life of $3$ years to a final value of zero, and the discount rate is $14\%.$

a$.$ What is the degree of operating leverage of Modern Artifacts when sales are $$11,050?($Do not round intermediate calculations. Round your answer to $2$ decimal places.$)$

b$.$ What is the degree of operating leverage when sales are $$17,810?($Do not round intermediate calculations. Round your answer to $2$ decimal places.$)$

c$.$ Why is operating leverage different at these two levels of sales?