A company is considering eliminating a product that generates a marginal contribution of $ 30,000 and $ 60,000 in fixed costs. Of these fixed costs, $ 15,000 cannot be avoided. The effect of eliminating the product on the company's total net income is: Select one: a. a decrease of $ 30,000. b. an increase of $ 15,000. c. a decrease of $ 15,000. d. an increase of $ 30,000.