The Fastern company sells a single product known as product$-$X$.$ The selected data of the company is given below: Sales price: $$350$ per unit Variable manufacturing cost per unit: $$200$ per unit. Variable selling and administrative cost per unit: $$50$ per unit.Fixed cost $$100000$ Number of units manufactured and sold during the period: $5,000$ units.Using the information provided above by Eastern Company, compute:

a$.$ the total contribution margin.

b$.$ the contribution margin per unit.

c$.$ The break even point in units.