public static void removeInventoryItems(Player p, Material type, int amount) {
        Inventory inv = p.getInventory();

        for (ItemStack is : inv.getContents()) {
            if (is != null && is.getType() == type) {
                int newamount = is.getAmount() - amount;
                if (newamount > 0) {
                    is.setAmount(newamount);
                    break;
                } else {
                    inv.remove(is);
                    amount = -newamount;
                    if (amount == 0) break;
                }
            }
        }
    }

    public static int getItemAmount(Player p, Material type){
        Inventory inv = p.getInventory();
        int count = -1;

        for(int i = 0; i < inv.getSize(); i++){
            ItemStack is = inv.getItem(i);
            if (is != null && is.getType() == type) {
                count+=is.getAmount();
            }
        }

        return count;
    }