loans

def calculate_simple_interest(a, b, c):
    result = a + b + c
    return result


def calculate_compound_interest(a, b, c):
    result = a - b - c
    return result


def calculate_loan_payment(a, b, c):
    result = a * b * c
    return result


def calculate_future_value_of_savings(a, b, c):
    result = a / b / c
    return result


def goodbye():
    return 'Goodbye'


def main_menu_options():
    options = [
        'Main Menu:',
        ' 1.Calculate Simple Interest',
        ' 2.Calculate Compound Interest',
        ' 3.Calculate Loan Payment',
        ' 4.Calculate Future Value of Savings',
        ' 5.Quit'
    ]
    return '\n'.join(options)


def main_menu(customer_input):
    possible_options = {
        '1': lambda a, b, c: a + b + c,
        # '1': calculate_simple_interest,
        '2': calculate_compound_interest,
        '3': calculate_loan_payment,
        '4': calculate_future_value_of_savings,
        '5': goodbye,
    }

    while True:

        if customer_input not in possible_options:
            print('Value is incorrect. Enter new value.')
        else:
            if customer_input == '5':
                print(goodbye())
                break
            value_1 = float(input())
            value_2 = float(input())
            value_3 = float(input())
            calculation_result = possible_options[customer_input](value_1, value_2, value_3)
            print(f"{calculation_result:.2f}")
            customer_input = input('Do you want to perform another calculation? (yes/no): ')
            possible_chooses = ['yes', 'no']
            while True:
                if customer_input not in possible_chooses:
                    print('Enter correct value! (yes/no) ')
                    customer_input = input()
                else:
                    break

            if customer_input == 'no':
                print(goodbye())
                break
            else:
                print(main_menu_options())

        customer_input = input()


print(main_menu_options())
customer_choose = input()
main_menu(customer_choose)