12. Trade Commissions

function tradeCommissions(city, sales) {
    let commission = 0;
    let amount;
    switch (city) {
        case "Sofia":
            if (sales >= 0 && sales <= 500) {
                commission = 5;
            } else if (sales > 500 && sales <= 1000) {
                commission = 7;
            } else if (sales > 1000 && sales <= 10000) {
                commission = 8;
            } else if (sales > 10000) {
                commission = 12;
            }
            break;
        case "Varna":
            if (sales > 0 && sales <= 500) {
                commission = 4.5;
            } else if (sales > 500 && sales <= 1000) {
                commission = 7.5;
            } else if (sales > 1000 && sales <= 10000) {
                commission = 10;
            } else if (sales > 10000) {
                commission = 13;
            }
            break;
        case "Plovdiv":
            if (sales > 0 && sales <= 500) {
                commission = 5.5;
            } else if (sales > 500 && sales <= 1000) {
                commission = 8;
            } else if (sales > 1000 && sales <= 10000) {
                commission = 12;
            } else if (sales > 10000) {
                commission = 14.5;
            }
            break;
    }
    if (commission > 0) {
        amount = sales * commission / 100;
        console.log(`${amount.toFixed(2)}`);
    } else {
        console.log("error");
    }
}