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CD School House - Education and Games (10.0) - Wayzata Technology (1995).iso
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MORTGAGE.TK
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Text File
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1987-01-01
|
3KB
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307 lines
TK!2
=v
#1
:n
:s
b
:c
********** MORTGAGE MODEL **********
#2
:n
salary
:v
2916.666666666667
:s
i
:u
$/mo
:d
$/yr
:c
salary
#3
:n
bracket
:v
.33
:s
i
:u
df
:d
%
:c
income tax bracket
#4
:n
onhand
:v
8000
:s
i
:u
$
:d
$
:c
cash for closing costs, down payment
#5
:n
term
:v
300
:s
i
:u
mo
:d
yr
:c
term of mortgage
#6
:n
rate
:v
.008750000000000001
:s
i
:u
df/mo
:d
%/yr
:c
interest rate
:f
.008333333333333333
#7
:n
house
:v
70000
:s
g
:u
$
:d
$
:c
maximum house price you can afford
#8
:n
loan
:s
b
:u
$
:d
$
:c
maximum mortgage allowed by bank
#9
:n
closing
:s
b
:u
$
:d
$
:c
closing costs
#10
:n
downpay
:s
b
:u
$
:d
$
:c
down payment
#11
:n
dp%
:s
b
:u
df
:d
%
:c
down payment percentage
#12
:n
payment
:s
b
:u
$/mo
:d
$/mo
:c
periodic mortgage payment
#13
:n
tax
:s
b
:u
$/mo
:d
$/mo
:c
property tax
#14
:n
pit
:s
b
:u
$/mo
:d
$/mo
:c
principal + interest + property tax
#15
:n
savings
:s
b
:u
$/mo
:d
$/mo
:c
periodic income tax savings
#16
:n
netpymt
:s
b
:u
$/mo
:d
$/mo
:c
periodic payment with tax savings
#17
:n
Tp
:s
b
:u
$
:d
$
:c
total amount paid over term
#18
:n
Tip
:s
b
:u
$
:d
$
:c
total interest payments over term
#20
:n
:s
b
:c
(Type =R to see the Rule Sheet)
=u
#1
:f
%
:t
df
:m
.01
#2
:f
yr
:t
mo
:m
12
#3
:f
$/mo
:t
$/yr
:m
12
#4
:f
df/mo
:t
%/yr
:m
1200
#5
:f
df/mo
:t
%/mo
:m
100
=r
#1
:r
closing = .02*loan + 500 " # # # # # # # # # # # # # # # # # # # # # # "
#2
:r
pit = .28*salary " According to the 1987 Tax Law, property tax "
#3
:r
onhand = downpay + closing " is no longer deductible, so for 1987 the "
#4
:r
tax = .025*.75*house/12 " savings = ... equation should be modified. "
#5
:r
house = loan + downpay " # # # # # # # # # # # # # # # # # # # # # # "
#6
:r
downpay = house*dp%
#7
:r
payment = loan*(rate/(1 - (1 + rate)^-term))
#8
:r
Tp = payment*term
#9
:r
Tip = Tp - loan
#10
:r
savings = bracket*(tax + payment*Tip/Tp) "/ average savings and netpymt
#11
:r
netpymt = pit - savings "\ over the term of loan
#12
:r
pit = payment + tax " i.e., .28*salary = f(loan,rate,term) + f(house)
#14
:r
" Note: The model lets you find how expensive a house you can buy given the
:s
C
#15
:r
" salary, loan terms, etc.; how much you need to earn to buy a certain
:s
C
#16
:r
" house; and so on. In the 1st case you have to guess the house price.
:s
C
%Tv,f,0,5,0,1,0