Blossom Repairs has 200 auto-maintenance service outlets nationwide: it performs primarily two fines of service or changes and brake repair, Oil change-related services represent 70 of its sales and provide a contribution markin ratio of 20 . Firake reocir represents 30% of its sales and provides a 40% contribution margin ratio. The company's fined costs are 512,480.000 ithat is. $62,400 per service outlet. Sales mixis determined based upon total sales dollars. (a) Sales Dollars Needed Per Product Oilchancet 3 Brake repeir 15