3.4

Python

code

# 3.4.py
# 18:06 2015-04-04

# r, rate
# n, number of periods
# ma, maximum amount
# a, monthly payments
# f, the total fees
# p, present value

r = 0.08083 / 12
n = 30 * 12
ma = 203150
p = ma

a = r * (1 + r)**n * p / ((1 + r)**n - 1)

r = 0.07875 / 12
n = 30 * 12
p = a / r * (1 - 1 / (1 + r)**n)
f = p - ma

fmt="{:25}{:10d}{:}"
print(fmt.format("monthly payments is" , round(a), "($)"))
print(fmt.format("total initial balance is ", round(p), "($)"))
print(fmt.format("the total fees is ", round(f), "($)"))
# end

output

monthly payments is            1502($)
total initial balance is     207210($)
the total fees is              4060($)

Fortran

3.4.f90

history

(2004-4-25, revised on 2014-08-16, 2015-04-04, 2016-10-10.)
2021-02-15 change XHTML to html5, change shift-jis to utf-8, add viewport.