66 Section 4: Additional Financial Functions
Changing Cash Flow Entries
z To change a cash flow amount:
1. Key the amount into the display.
2. Press ?.
3. Key in the number of the register containing the cash flow amount to be
changed.
z To change the number of times a cash flow amount occurs consecutively –
that is, to change the N
j
for a CF
j
:
1. Store the number of that cash flow amount (that is, j) in the n register.
2. Key the number of times the cash flow amount occurs consecutively
into the display.
3. Press ga.
Note: If you change the number in the n register in order to change an N
j
,
be sure to reset the number in the n register to the total number of cash
flow amounts originally entered (not including the amount of the initial
investment CF
0
). If this is not done, NPV and IRR calculations will give
incorrect results.
Example 1: With the cash flows now stored in the calculator, change CF
2
from
$11,000 to $9,000, then calculate the new NPV for a 13½% return.
Since this NPV is negative, the investment would decrease the financial value of
the investor’s assets.
Example 2: Change N
5
from 2 to 4, then calculate the new NPV.
Keystrokes Display
9000?2
9,000.00
Stores the new CF
2
in R
2
.
13.5¼
13.50
Stores i
a
a This step is necessary in this example because we have calculated IRR since the first
time we calculated NPV. The IRR calculation replaced the 13.5 we keyed into i before
calculating NPV with the result for IRR – 13.72.
fl
–644.75
The new NPV.
Keystrokes Display
5n
5.00
Stores j in the n register.
4ga
4.00
Stores the new N
5
.
7n
7.00
Resets the number in the n register
to its original value.
fl
–1,857.21
The new NPV.
