12. Trade Commissions

#include <iostream>
using namespace std;

int main()
{
	string city;
	double sales;

	cin >> city >> sales;

	double commision = 0;
	if (city == "Sofia") {
		if (sales >= 0 && sales <= 500) {
			commision = 0.05;
		}
		else if (sales > 500 && sales <= 1000) {
			commision = 0.07;
		}
		else if (sales > 1000 && sales <= 10000) {
			commision = 0.08;
		}
		else if (sales > 10000) {
			commision = 0.12;
		}
	}
	else if (city == "Varna") {
		if (sales >= 0 && sales <= 500) {
			commision = 0.045;
		}
		else if (sales > 500 && sales <= 1000) {
			commision = 0.075;
		}
		else if (sales > 1000 && sales <= 10000) {
			commision = 0.1;
		}
		else if (sales > 10000) {
			commision = 0.13;
		}
	}
	else if (city == "Plovdiv") {
		if (sales >= 0 && sales <= 500) {
			commision = 0.055;
		}
		else if (sales > 500 && sales <= 1000) {
			commision = 0.08;
		}
		else if (sales > 1000 && sales <= 10000) {
			commision = 0.12;
		}
		else if (sales > 10000) {
			commision = 0.145;
		}
	}

	cout.setf(ios::fixed);
	cout.precision(2);

	if (commision != 0) {
		cout << sales * commision;
	}
	else {
		cout << "error" << endl;
	}
}