Paypal Fee Calculator

fee_calc.py

def paypal_fee() -> None:
    """
    Paypal Fee Calculator
    """
    FEE_RATE: float = 0.054
    TRANSACTION_CHARGE: float = 0.3

    print("Let's calculate a paypal transaction fee.")
    amount = float(input("Amount ($): "))

    fee = amount * FEE_RATE + TRANSACTION_CHARGE
    full_amount = (amount + TRANSACTION_CHARGE) / (1 - FEE_RATE)

    print(
        f" * Sending: $ {amount}, "
        f"they receive: $ {round(amount-fee, 2)}, "
        f"fee is: $ {round(fee, 2)}"
    )
    print(
        f" * Sending: $ {round(full_amount, 2)}, "
        f"they receive: $ {round(amount, 2)}, "
        f"fee is: $ {round(full_amount-amount, 2)}"
    )