Try the calculator
below. Use P = present value = 80000
r = rate = .09, t =years = 25, c = compound periods =
12
Leave the F blank.
This is a
Annuity
- Amortization calculator.

Do not use commas or dollars signs in textboxes.

R =

= rent
P =

= present value
r =

= interest rate per
year
t =

= number
of years
c =

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
365
= compounds
per year
monthly = 12, quarterly = 4
ANSWER:
You
must enter values in 3 out of the 4 textboxes.

If you get NaN
in the answer box , check your input values. F should be more
than P . Interest rate should be between 0 and 1. Years can
be partial years i.e. 1 and a half years = 1.5

Ti-83 TVM
Time Value of Money

The Ti-83 has
finance functions. In the Ti-83plus, the finance functions are
located in the Apps (applications) menu. You can download other functions
for the Ti-83plus.

You want to
purchase a home for $150,000 with a traditional 30 year loan with monthly
payments at the end of each month. What is your monthly payment at 8%
compounded monthly? How much would you pay for the house?
Press
2nd FINANCE
1 ENTER
N = 12 × 30 = 360 Number of payments
I % = 8 means 8 %
no decimal for TVM needed
PV = 150000 is Present
Value
PMT payment or rent is unknown
FV = 0 Future Value is
zero when loan is paid off
P/Y and C/Y = 12 payments
and compound periods per year
PMT: END most loans compound the interest at the end
of the month,
Press
2nd
QUIT 2nd
FINANCE 2
(tvm_Pmt) Í
Your
payment (or rent) would be $1,100.64. 12 months × 30
years = 360 payments
You pay 360 × 1,100.64 = $396,230.40 for
the house.
Use your calculator or the Annuity Calculator above
to find the monthly payment at 7%.
The monthly payment is $997.95. You pay 360 × 997.95 =
$359,262.00 for the house. That is about a $37,000 dollar
savings.