09. Trade Commissions - Conditional Statements Advanced

function tradeCommissions(input) {
    let city = input.shift();
    let sales = Number(input.shift());

    let commissions = 0;

    if (sales >= 0 && sales <= 500) {
        switch (city) {
          case "Sofia":
            commissions = sales * 0.05;
          break;
          case "Varna":
            commissions = sales * 0.045;
           break;
          case "Plovdiv":
            commissions = sales * 0.055;
           break;
           default :
            console.log("error");
           break;
        }
    } else if (sales >= 500 && sales <= 1000) {
        switch (city) {
          case "Sofia":
            commissions = sales * 0.07;
          break;
          case "Varna":
            commissions = sales * 0.075;
           break;
          case "Plovdiv":
            commissions = sales * 0.08;
           break;
           default :
            console.log("error");
           break;
        }
    } else if (sales >= 1000 && sales <= 10000) {
        switch (city) {
          case "Sofia":
            commissions = sales * 0.08;
          break;
          case "Varna":
            commissions = sales * 0.1;
           break;
          case "Plovdiv":
            commissions = sales * 0.12;
           break;
           default :
            console.log("error");
           break;
        }
    } else if (sales >= 10000) {
        switch (city) {
          case "Sofia":
            commissions = sales * 0.12;
          break;
          case "Varna":
            commissions = sales * 0.13;
           break;
          case "Plovdiv":
            commissions = sales * 0.145;
           break;
           default :
            console.log("error");
           break;
        }
    }else {
      console.log("error");
    }
    if (commissions !== 0) {
      console.log(commissions.toFixed(2));
    }
}