BiswajitNandi Thank you for your feedback, but your method is for managing stock.
What I am trying to say is, it happens a lot of time that a customer orders 10/15 different items. From them 1 or 2 items is not available at that time. In a fast paced food / store environment this can happen a lot unintentionally.
what does the store owner do at this point? Cancel the whole order for just 1 item missing? Most of the time customer do not mind if merchant has 1 item out of stock. Merchant should be able to remove the "item(s)" from the list and total amount should be updated automatically.
From my understanding it should not be that complicated to implement this important feature.
Hope I was able to explain.