function calculeazaPret(rankInitial, rankFinal) {
  var priceArr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10, 10, 10, 10, 10];
  var price = 0;
  for (var i = rankInitial - 1; i < rankFinal - 1; i++) {
    price += priceArr[i];
  }
  return price;
}