wagecalc_v1

#Variables used in time based calculation
WEEKS_IN_YEAR = 56
MONTHS_IN_YEAR = 12
WEEKS_IN_MONTH = 4.5

#Can't figure out how to call upon local values.
#Here is the error:
#  File "WageCalc.py", line 44, in Main
#    CalculateWages(wage_per_hour, hours_per_week)
#NameError: global name 'wage_per_hour' is not defined


def GetWage():
    print "What's your hourly rate?"
    wage_per_hour = int(raw_input(">> $"))
    print "How many hours do you work per week?"
    hours_per_week = int(raw_input(">> "))
    return wage_per_hour, hours_per_week
def GetExpences():
    print "What is your monthly rent?"
    rent_per_month = int(raw_input(">> $"))
    print "What do your monthly bills typically amount to?"
    bills_per_month = int(raw_input(">> $"))
    monthly_expences = rent_per_month + bills_per_month
    yearly_expences = monthly_expences * MONTHS_IN_YEAR
    return monthly_expences, yearly_expences

def CalculateWages(wage_per_hour, hours_per_week):
    weekly_paycheck = wage_per_hour * hours_per_week
    monthly_wage = weekly_paycheck * WEEKS_IN_MONTH
    yearly_income = weekly_paycheck * WEEKS_IN_YEAR
    return weekly_paycheck, monthly_wage, yearly_income

def SubtractExpences(monthly_wage, yearly_income,
    monthly_expences, yearly_expences):
    monthly_net_total = monthly_wage - monthly_expences
    yearly_net_total = yearly_income - yearly_expences
    return monthly_net_total, yearly_net_total


def Main():
    GetWage()
    GetExpences()
    CalculateWages(wage_per_hour, hours_per_week)
    SubtractExpences(monthly_wage, yearly_income,
    monthly_expences, yearly_expences)
    print("""
        You make
        $%s per month and
        $%s per year.

        After bills, your net income is
        $%s per month and
        $%s per year
        so plan accordingly.
        """) % (monthly_wage, yearly_income,
        monthly_net_total, yearly_net_total)
    raw_input("RETURN to close")

Main()