please show all work and explain each part

A )

B)

C

Fixed expenses total $597,500 per month. Prepare a contribution format income statement for the company as a whole. (Round your percentage answers to (i.e. 0.1234 should be entered as 12.34).) What is the company's break-even point in dollar sales based on the current sales mix? (Do not round intermediate calculations. Round your answer to the nearest whole dollar amount.) If sales increase by $58,000 a month, by how much would you expect the monthly net operating income to increase? round intermediate calculations. Round your answer to the nearest whole dollar amount.)