12. Trade Commissions

#include <iostream>
#include <string>
using namespace std;
int main()
{
    string town;
    double sales=0;
    double parcentage = 0;
    cin >> town >> sales;
    cout.setf(ios::fixed);
    cout.precision(2);
    if (sales < 0)
        cout << "error" << endl;
    else
    {
        if (town == "Sofia")

        {
            if (sales <= 500)
            {
                parcentage = 0.05;
                cout << parcentage * sales << endl;
            }
            else if (sales <= 1000)
            {
                parcentage = 0.07;
                cout << parcentage * sales << endl;
            }
            else if (sales <= 10000)
            {
                parcentage = 0.08;
                cout << parcentage * sales << endl;
            }
            else if (sales > 10000)
            {
                parcentage = 0.12;
                cout << parcentage * sales << endl;
            }
        }
        else if (town == "Varna")

        {
            if (sales <= 500)
            {
                parcentage = 0.045;
                cout << parcentage * sales << endl;
            }
            else if (sales <= 1000)
            {
                parcentage = 0.075;
                cout << parcentage * sales << endl;
            }
            else if (sales <= 10000)
            {
                parcentage = 0.1;
                cout << parcentage * sales << endl;
            }
            else if (sales > 10000)
            {
                parcentage = 0.13;
                cout << parcentage * sales << endl;
            }
        }
        else if (town == "Plovdiv")

        {
            if (sales <= 500)
            {
                parcentage = 0.055;
                cout << parcentage * sales << endl;
            }
            else if (sales <= 1000)
            {
                parcentage = 0.08;
                cout << parcentage * sales << endl;
            }
            else if (sales <= 10000)
            {
                parcentage = 0.12;
                cout << parcentage * sales << endl;
            }
            else if (sales > 10000)
            {
                parcentage = 0.145;
                cout << parcentage * sales << endl;
            }
        }
        else
            cout << "error" << endl;
    }
    return 0;
}