Anybody using this system to track liquor sales and inventory?

My first go at it is to have Menu buttons for 1 and 2 shots for each of the Call drinks. Then a single inventory item that will convert a liter into 22 1.5 oz drinks when ever an inventory purchase is done.

I already tested and if a 750ml bottle is used instead of a liter, you just use .75 for the quantity purchased. That will translate to 16 1.5oz drinks and put that amount into inventory instead

Now, I can use the recipe funtion to attach the inventory item to the menu item and use 1 each for the singles and 2 each for the doubles.

Does this sound practical?

Next...mixed drinks...OMG!