BED: assembles and sells motor T.Fehicles. It uses an actual costing system, in which unit costs are calculated on a monthly.r basis. The selling

This is the question 7. I want to know why the answer D and answer B is correct to choose. Could you provide me the reason of calculation?

This is the question 8. I want to know why the break-even point in unit sales is 36000 units and dollar sales is 1080000. Provide me the steps of calculation.