Cullumber Delivery is a rapidly growing delivery service. Last year, 80% of its revenue came from the delivery of mailing "pouches" and small, standardized delivery boxes (which provides a 20% contribution margin). The other 20% of its revenue came from delivering non-standardized boxes (which provides a 70% contribution margin). With the rapid growth of Internet retail sales, Cullumber believes that there are great opportunities for growth in the delivery of non-standardized boxes. The company has fixed costs of $ 13,824,900. The sales mix is determined based upon total sales dollars. a) What is the company’s break-even point in total sales dollars? At the break-even point, how much of the company’s sales are provided by each type of service?