Greenpark Skateboards uses a standard part in the manufacture of several of its skateboards. The cost of producing 43,000 parts is $138,000, which includes fixed costs of $70,000 and variable costs of $68,000. The company can buy the part from an outside supplier for $4.00 per unit, and avoid 30% of the fixed costs. If the company makes the part, how much will its operating income be? O A. $91,000 greater than if the company bought the part B. $83,000 less than if the company bought the part C. $91,000 less than if the company bought the part D. $83,000 greater than if the company bought the part