if you might know what part B is please answer as well thank you so much

PDQ Repairs has 200 auto-maintenance service outlets nationwide. It performs primarily two lines of service: oil changes and brake repair. Oil change-related services represent 80% of its sales and provide a contribution margin ratio of 15\%. Brake repair represents 20% of its sales and provides a 35% contribution margin ratio. The company's fixed costs are $15,792,800 (that is, $78,964 per service outlet). (a) Calculate the dollar amount of each type of service that the company must provide in order to break even. (Use Weighted-Average Contribution Margin Ratio rounded to 2 decimal places eg. 0.25 and round final answers to 0 decimal places, es. 2,510.) Oil changes Brake repair Attempts: 0 of 5 used (b) The parts of this question must be completed in order. This part will be available when you complete the part above