What is the company's break-even point in total sales dollars? At the treak-even point, how much of the company's sales are provided by each type of service? The company''s management would like to hold its fixed costs constant but shift its sales mix so that 60% of its revenue comes from the delivery of non-standardized boxes and the remainder from pouches and small boxes. If this were to occur, what would be the company's break-even sales, and what amount of sales would be provided by each type