def calculate_vehicle_mass(unladen_mass, passengers_mass, cargo_mass):
    """
    Calculate vehicle_mass [kg].

    :param unladen_mass:
        Unladen mass [kg].
    :type unladen_mass: float

    :param passengers_mass:
        Passengers mass including the driver [kg].
    :type passengers_mass: float

    :param cargo_mass:
        Cargo mass [kg].
    :type cargo_mass: float

    :return:
        Vehicle mass [kg].
    :rtype: float
    """
    return unladen_mass + passengers_mass + cargo_mass
