You are doing great in your new business and all of your suggestions so far have been implemented. You are considering a new capital purchase and would like to discussion capital investment purchasing criteria and decision making. Compose a short email - 5 to 7 sentences because your business partner is too busy to read anything longer than that - proposing a capital purchase using the Net Present Value method as justification (you'll have to create your own numbers - make sure it is a positive NPV!)