Trade Commission

function Firm(input){
 let grad = input.shift();
 let sells = Number(input.shift());
 let price = 0;

 if(grad === "Sofia"){
   if(sells <= 0 || sells <= 500 ){
      price = sells * 0.05;
      console.log(price.toFixed(2));
   }
   else if(sells < 500 || sells <= 1000 ){
      price = sells * 0.07;
      console.log(price.toFixed(2));
   }
   else if(sells < 1000 || sells <= 10000 ){
    price = sells * 0.08;
    console.log(price.toFixed(2));
   }
   else if(sells > 10000 ){
    price = sells * 0.12;
    console.log(price.toFixed(2));
   }
   else{
       console.log('error');
   }
 }
 else if(grad === "Varna"){
    if(sells <= 0 || sells <= 500 ){
       price = sells * 0.045;
       console.log(price.toFixed(2));
    }
    else if(sells < 500 || sells <= 1000 ){
       price = sells * 0.075;
       console.log(price.toFixed(2));
    }
    else if(sells < 1000 || sells <= 10000 ){
     price = sells * 0.1;
     console.log(price.toFixed(2));
    }
    else if(sells > 10000 ){
     price = sells * 0.13;
     console.log(price.toFixed(2));
    }
    else{
        console.log('error');
    }

  }
  else if(grad === "Plovdiv"){
    if(sells <= 0 || sells <= 500 ){
       price = sells * 0.055;
       console.log(price.toFixed(2));
    }
    else if(sells < 500 || sells <= 1000 ){
       price = sells * 0.08;
       console.log(price.toFixed(2));
    }
    else if(sells < 1000 || sells <= 10000 ){
     price = sells * 0.12;
     console.log(price.toFixed(2));
    }
    else if(sells > 10000 ){
     price = sells * 0.145;
     console.log(price.toFixed(2));
    }
    else{
        console.log('error');
    }

  }
  else{
      console.log('error');
  }
}