Following are utilities costs for different level of machine hours: $225 for 5 hours: $270 for 6 hours : $315 for 7 hours : $360 for 8 hours. This cost is best described as Select one: O a. Fixed b. Direct O c. None of the answers given d. Mixed e. Variable XYZ company currently sells 15,000 units a month for $50 each, has variable costs of $20 per unit, and fixed costs of $300,000. The company is considering increasing the price of its units to $65 per unit. If the price is changed, how many units will the company need to sell for profit to remain the same as before the price change? Select one: O a. None of the given answers. b. 7.500 O c. 9.000 d. 11.250 e. 10,000