adding calculate currency for bussiness group

models/cmc_debt.py

@@ -0,0 +1,21 @@
+from dataclasses import dataclass
+from typing import Optional
+
+@dataclass
+class CMCDebt:
+    id: Optional[int]
+    name: str
+    amount: int
+
+    def to_dict(self):
+        if self.id is None:
+            return {
+                "name": self.name,
+                "amount": self.amount
+            }
+        
+        return {
+            "id": self.id,
+            "name": self.name,
+            "amount": self.amount
+        }