Program_5-23.py

def main():
    sales = get_sales()
    advanced_pay = get_advanced_pay()
    comm_rate = determine_comm_rate(sales)
    pay = sales * comm_rate - advanced_pay
    print('The pay is $', format(pay, ',.2f'), sep='')
    if pay < 0:
        print('The Salesperson must be reimbursed')
        print('the company.')

def get_sales():
    monthly_sales = float(input('Enter the monthly sales: '))
    return monthly_sales

def get_advanced_pay():
    print('Enter the amount of advanced pay, or')
    print('enter 0 if no advanced pay was given.')
    advanced = float(input('advanced pay: '))
    return advanced

def determine_comm_rate(sales):
    if sales < 10000.00:
        rate = 0.10
    elif sales >= 10000 and sales <= 14999.99:
            rate = 0.12
    elif sales >= 15000 and sales <= 17999.99:
            rate = 0.14
    elif sales >= 18000 and sales <= 21999.99:
            rate = 0.16
    else:
            rate = 0.18
    return rate

main()