HP·38E/38C - Slide Rule Museum
HP·38E/38C - Slide Rule Museum
HP·38E/38C - Slide Rule Museum
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38 The Financial Functions<br />
Keystrokes<br />
OJ CLEAR [£j[J<br />
81ENTERtl400<br />
6000 I CHS I (E]<br />
lOOOO§]<br />
CD<br />
40<br />
Display<br />
32.00<br />
-6,000.00<br />
10,000.00<br />
1.61<br />
6.44<br />
What if the compounding were monthly?<br />
Keystrokes<br />
8[]] 00<br />
CD<br />
120<br />
Display<br />
96.00<br />
0.53<br />
6.40<br />
Quarters.<br />
Investment.<br />
Total returned.<br />
% quarterly interest rate.<br />
% annual interest rate.<br />
Months.<br />
% monthly interest rate .<br />
% annual interest rate.<br />
Example 2: What is the annual interest rate on a 25-year, $32,500<br />
mortgage with $230 monthly payments?<br />
$32,500 PV<br />
-$230 PMT<br />
S h . h D.MY lUll M.DY END<br />
et t e payment SWltC BEGIN END to .<br />
Keystrokes Display<br />
i?<br />
25 x 12 months n<br />
OJ CLEAR [£j[J<br />
25 []] 00 300.00 Months.<br />
230 I CHS II PMT I -230.00 Remember the sign<br />
con venti on .<br />
32500 (E] 32,500.00 Mortgage amount.<br />
CD 0.58 % monthly interest rate.<br />
120 7.01 % annual interest rate.
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