Yes, price can be changed only if open price is enabled during item creation.

Follow the below steps to enable open price for an item.

Step 1 – Go to the Masters menu on the Alacarte dashboard.

Step 2 – Select Item from the list.

Step 3 – In the item creation form that appears, select the view tab.

Step 4 – Double click the item that requires an open price.

Step 5 –Enable open price and update.

 You have successfully enabled open price on the item.