This is the only answer.
Case 4: The calculator displays the message:
The calculation is very complex. It might involve more than one positive or negative answer, or there may be no solution. To continue the calculation, you must store a guess.
Case 5: The calculator displays:
There is no answer. This situation might be the result of an error, such as a mistake in keying in the cash flows. A common mistake is to put the wrong sign for a cash flow. A valid cash flow series must have at least one positive and one negative cash flow.
Halting and Restarting the IRR% Calculation
The search for IRR% may take a relatively long time. You can halt the calculation at any time by pressing any key. The calculator then displays the current estimate for IRR%. You can resume the calculation by:
Pressing s while the current estimate is displayed in the calculator line. This continues the calculation from where it left off.
Storing a guess for IRR%, discussed below.
Storing a Guess for IRR%
To enter a guess, key in an estimate of IRR% and then press s .
You can enter a guess for IRR% at these times:
Before beginning the calculation. This can reduce the time required to calculate an answer.
After you’ve halted the calculation.
After the calculator has halted the calculation due to any of the above cases. For cases 3 and 5, however, no (other) solutions will be found.
When calculating IRR% using a guess, the calculator displays the current estimate of IRR% and the calculated value of NPV for each iteration. The calculation halts when the calculator finds an answer. However, there
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