fix income below 5000000 vnd

expense_forecast/Expense_Forecasting.py

@@ -50,6 +50,8 @@ def get_input_data(income, interest_rate, inflation_rate, holidays):
     return input_data
 
 def forecast_expense(model_fit, input_data, df):
+    if (input_data['Income (VND)'] < 5000000):
+        return input_data['Income (VND)'] * 0.78492
     forecast = model_fit.predict(start=len(df), end=len(df), exog=input_data)
     return forecast.iloc[0]