import 'dart:io';

void main(){

  List<Map<String,double>> incomes = [];
  List<Map<String,double>> expenses = [];

  while(true){

    int select = int.parse(stdin.readLineSync()!);

    if(select == 1){

      String title = stdin.readLineSync()!;
      double money = double.parse(stdin.readLineSync()!);

      if(money < 0){
        print("Amount must be positive");
      } else {
        incomes.add({title : money});
        print("New income saved");
      }
    }

    else if(select == 2){

      String title = stdin.readLineSync()!;
      double money = double.parse(stdin.readLineSync()!);

      if(money < 0){
        print("Amount must be positive");
      } else {
        expenses.add({title : money});
        print("New expense saved");
      }
    }

    else if(select == 3){

      double incomeTotal = 0;
      double expenseTotal = 0;

      for(var i in incomes){
        incomeTotal += i.values.first;
      }

      for(var e in expenses){
        expenseTotal += e.values.first;
      }

      double result = incomeTotal - expenseTotal;

      print("Income: $incomeTotal");
      print("Expenses: $expenseTotal");

      String message = result >= 0 
          ? "Profit: $result" 
          : "Loss: ${result.abs()}";

      print(message);

      double taxValue = result > 0 ? result * 0.15 : 0;

      if(taxValue != 0){
        print("Tax (15%): $taxValue");
      }
    }

    else if(select == 4){
      break;
    }
  }
}