monthly pay calcualtor

m_pay_calc.py

def month_pay_calc(base, month_rate, month_count):
    return (base * month_rate * ((month_rate+1.0)**month_count)) / \
           ((month_rate+1.0)**month_count - 1.0)


base = 124 * 10000
g_base_1 = 80 * 10000
g_base_2 = 30 * 10000

month_count = 12 * 30

year_rate = 6.55 * 0.01
g_year_rate = 4.50 * 0.01

month_rate = year_rate / 12.0
month_rate_95 = month_rate * 0.95
month_rate_90 = month_rate * 0.9
month_rate_85 = month_rate * 0.85
month_rate_80 = month_rate * 0.80

g_month_rate = g_year_rate / 12.0


month_pay = month_pay_calc(base, month_rate, month_count)
month_pay_95 = month_pay_calc(base, month_rate_95, month_count)
month_pay_90 = month_pay_calc(base, month_rate_90, month_count)
month_pay_85 = month_pay_calc(base, month_rate_85, month_count)
month_pay_80 = month_pay_calc(base, month_rate_80, month_count)

print 'year_rate: {0}\tmonth_rate: {1}\tmonth_pay: {2}'.format(
    year_rate, month_rate, month_pay)

print 'year_rate_95: {0}\tmonth_rate_95: {1}\tmonth_pay_95: {2}'.format(
    year_rate * 0.95, month_rate_95, month_pay_95)

print 'year_rate_90: {0}\tmonth_rate_90: {1}\tmonth_pay_90: {2}'.format(
    year_rate * 0.90, month_rate_90, month_pay_90)

print 'year_rate_85: {0}\tmonth_rate_85: {1}\tmonth_pay_85: {2}'.format(
    year_rate * 0.85, month_rate_85, month_pay_85)

print 'year_rate_80: {0}\tmonth_rate_80: {1}\tmonth_pay_80: {2}'.format(
    year_rate * 0.80, month_rate_80, month_pay_80)

g_month_pay_1 = month_pay_calc(g_base_1, g_month_rate, month_count) + \
                month_pay_calc(base-g_base_1, month_rate, month_count)

print g_month_pay_1

g_month_pay_2 = month_pay_calc(g_base_2, g_month_rate, month_count) + \
                month_pay_calc(base-g_base_2, month_rate, month_count)
print g_month_pay_2