public void BuyItem(Transform transform)
 {
     int indexOfButton = transform.GetSiblingIndex();
     if (indexOfButton < shopList.ItemsToBuy.Length)
     {
         EquipmentObject itemToBuy = shopList.ItemsToBuy[indexOfButton];
         if (inventory.BuyItem(itemToBuy, currencyID))
         {
             currentPlayerHealth.maxRunTimeValue = currentPlayerHealth.maxRunTimeValue + (itemToBuy.defenceBonus * 2);
             currentPlayerHealth.runTimeValue = currentPlayerHealth.maxRunTimeValue;
             playerHealthObserver.Raise();
         }
     }
 }