Could you help me plz?

I have no idea if the answer I filled in is correct.

Express 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, Express believes that there are great opportunities for growth in the delivery of non-standardized boxes. The company has fixed costs of $13,413,900. (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? (Use Weighted-Average Contribution Margin Ratio rounded to 2 decimal places eg. 0.22 and round final answers to 0 decimal ploces, eg. 2,510.) (b) 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 service type? (Use Weighted-Average Contribution Margin Ratio rounded to 2 decimal places eg. 0.22 and round final answers to 0 decimal places, eg. 2,510.) Last saved 1 second ago. Saved work will be auto-submitted on the due date. Auto-submission can take up to 10 minutes Attempts: 0 of 1 used