I. Calculate the following using ratios rather than the chart:

a$.$ Contribution to sales ratio.

b$.$ Breakeven point in units.

c$.$ Breakeven point in revenue.

d$.$ How many units need to be sold to achieve a profit of $$50,000$

e$.$ How much revenue is required to achieve a profit of $$50,000.$

f$.$ The margin of safety.

II$.($ii$)$ Draw a Break$-$even chart for the product based on the above information and determine where the breakeven point is using the chart.