how does else if statment work inside a for loop?

I had a challenge that says :

• you have an array of these items :

  const items = ["gold cup", "puppy", "sword", "whale's tooth", "squid tentacle"];

• and this array shows items’ price respectively :

  const prices = [5, 4, 10, 20, 100];
  

• every price of an item isn't mentioned in the items array is equal to 1

create a function that calculate the value "the price " of some chosen items which are located in ChosenItem array. So I used nested for loop and used if and else if statments. it worked fine but it doesnt add 1 for every unmentioned item . and it adds more than 1. here's the code :

      let TotalPrice = 0;
       let ChosenIems = ["puppy", "sword","eagle eye"];
    function PricesCalculator() {
      for (i = 0; i < ChosenIems.length; i++) {
        for (x = 0; x < items.length; x++) {
          if (ChosenIems[i] === items[x]) {
            TotalPrice += prices[x];
          }
                 else   if (ChosenIems[i] !== items[x]) {
            TotalPrice += 1;
          }
      
        } 
      }
  return TotalPrice;}
    console.log(PricesCalculator(), TotalPrice);