The total cost of producing 200 pens is Tk. 1000, on the other hand producing 400 pens at total cost is Tk. 1500. Selling price per unit at the rate of Tk. 3. Take number of quantity q and total cost c.

a. Find Revenue function, Cost function and Profit function.

b. Find Marginal cost and Average cost of 300 pens is made.

c. Compute sales if 600 units are made and sold.

d. If profit is Tk. 2000 then find number of quantity.

e. If loss is Tk. 400 then find number of quantity.

f. Construct Break-even chart and level Cost line, Revenue Line, Break-even

point.