Как сделать чтобы один метод принимал переменные разных классов

import datetime as dt
class Cash_Calculator():
    c = [] 
    def __init__(self, a, b, limit=1000):
        self.a = int(a)
        self.b = int(b) 
        self.limit = limit
    def pluss(self):
        sum = self.a + self.b
        return Cash_Calculator.c.append(sum)
 
class Calories_Calculator():
    b = [] 
    def __init__(self, a, b, limit=1000):
        self.a = int(a)
        self.b = int(b) 
        self.limit = limit
    def plus(self):
        sum = self.a + self.b
        return Calories_Calculator.b.append(sum)
 
class Records():
    f = []
    d = dt.date.today()
    def __init__(self, amount, comment, date):
        self.amount = amount
        self.comment = input("Введите комментарий ")
        self.date = str(Records.d)
    def create_r(self):
        if Calories_Calculator.b[-1] != None:
          self.amount = str(Calories_Calculator.b[-1]) 
          a = {'amount=':self.amount for i in self.amount}
          b = {'comment=':self.comment for i in self.comment}
          c = {'date=':self.date for i in self.date}
          d = {**a, **b, **c}
          return Records.f.append(d)
        elif Cash_Calculator.c[-1] != None:
          self.amount = str(Cash_Calculator.c[-1]) 
          a = {'amount=':self.amount for i in self.amount}
          b = {'comment=':self.comment for i in self.comment}
          c = {'date=':self.date for i in self.date}
          f = {**a, **b, **f}
        return Records.f.append(f)
 
C = Cash_Calculator(11, 5)
C.pluss()
#F = Calories_Calculator(6, 6)
#F.plus()
B = Records(None, None, None)
B.create_r()
print(Records.f)

d1={'q':2}
d2={44:True}
lst=[d1,d2]