Next question Greenpark Skateboards uses a standard part in the manufacture of several of its skateboards. The cost of producing 40,000 parts is $141,000, which includes fixed costs of $72,000 and variable costs of $69,000. The company can buy the part from an outside supplier for $3.70 per unit, and avoid 30% of the fixed costs. If the company makes the part, how much will its operating income be? OA. $57,400 less than if the company bought the part OB. $93,600 less than if the company bought the part OC. $93,600 greater than if the company bought the part OD. $57,400 greater than if the company bought the part