Sample Problem $4$

$$ Your company is evaluating a new product

$$ It will take four years of investment at $$250,000$ per year to launch

the product $($payments are at the end of each year$)$

$$ Beginning at the end of year $5,$ you expect to sell the same number of

products each year for $25$ years

$$ The $$cash flow$$ per product is expected to be $$75\mathrm{.}00$

$$ If the required rate of return is $15\%,$ how many products per year

are required?