This means that the cash outflows (i.e., cah payment) for an investment should be related to the cash flow (i.e., cash receipts) from that investment. Conceptually, if the amounts and timing of the cash outflows and cash inflows related to an investment are the same, the rate of return (i.e., interest rate) is zero. Of course, in practice, the cash inflows an investment must usually be more than the cash outflows, which means that interest is earned. Therefore, measurement of the investment worth of a capital expenditures should explicitly include interest, which is the time value of money. This is because any rational investor would rather have a dollar today than at any future date.