tradeCommissions

function tradeCommissions(input) {
    let city = input[0];
    let sells = Number(input[1]);
    let comission = 0;

    switch (city) {
        case "Sofia":
            if (sells < 0) {
                console.log("error");
            }
            else if (sells >= 0 && sells <= 500) {
                comission = sells * 0.05;
                console.log(comission.toFixed(2));
            } else if (sells > 500 && sells <= 1000) {
                comission = sells * 0.07;
                console.log(comission.toFixed(2));
            } else if (sells > 1000 && sells <= 10000) {
                comission = sells * 0.08;
                console.log(comission.toFixed(2));
            } else if (sells > 10000) {
                comission = sells * 0.12;
                console.log(comission.toFixed(2));
            }
            break;

        case "Varna":
            if (sells < 0) {
                console.log("error");
            }
            else if (sells >= 0 && sells <= 500) {
                comission = sells * 0.045;
                console.log(comission.toFixed(2));
            } else if (sells > 500 && sells <= 1000) {
                comission = sells * 0.075;
                console.log(comission.toFixed(2));
            } else if (sells > 1000 && sells <= 10000) {
                comission = sells * 0.1;
                console.log(comission.toFixed(2));
            } else if (sells > 10000) {
                comission = sells * 0.13;
                console.log(comission.toFixed(2));
            }
            break;
        case "Plovdiv":
            if (sells < 0) {
                console.log("error");
            }
            else if (sells >= 0 && sells <= 500) {
                comission = sells * 0.055;
                console.log(comission.toFixed(2));
            } else if (sells > 500 && sells <= 1000) {
                comission = sells * 0.08;
                console.log(comission.toFixed(2));
            } else if (sells > 1000 && sells <= 10000) {
                comission = sells * 0.12;
                console.log(comission.toFixed(2));
            } else if (sells > 10000) {
                comission = sells * 0.145;
                console.log(comission.toFixed(2));
            }
            break;
        default: console.log("error");
    }
}

tradeCommissions(["Kaspichan",
"-50"])