I need help! I have very few time!

QUESTION U FIRST Following information is provided for next month operations of a retail store BUDGETED DATA Sales units 800 Sales 100.0% 4000 Purchase cost of sales* 55.0% 2200 Sales commission* 10.0% 400 Sales packaging* 5.0% 200 Shop rental per month 400 Staff salaries per month 200 Profit 600 * Calculated as a % of sales. Required: Marks Calculate contribution margin per unit Calculate contribution margin ratio (%). Calculate Break Even Point in units per month - N Calculate Break Even Point in $ per month Calculate safety margin in $ at above sales. Calculate safety margin in units at above sales. Calculate safety index in % at above sales. Calculate operating leverage at above sales. What % increase in sales is necessary to double its above profit? Required sales in units to achieve target profit of 840 Profit earned if sales in $ increase to 5000 Total 14