If you insulate your office for $19,000, you will save $1,900 a year in heating expenses. These savings will last forever.

a.	What is the NPV of the investment when the cost of capital is 5%? 10%? (Leave no cells blank - be certain to enter "0" wherever required.)

Cost of Capital	NPV
5%	$
10%

b.	What is the IRR of the investment?

IRR

%

c.	What is the payback period on this investment?

Payback period

years