Suppose the sales in the first year, R, are $100 and they grow
every year at a growth rate of g = 10%. Also, suppose that the net
margin is 40%. This means that earnings in the first year are going
to be 0.4*100 = $40. Assuming that the discount rate, d, is 25%.
What is the present value of earnings assuming that the company
survives for 10 years?