Have the ability to enter how many of one item you have.
ie: I am buying 2 packages of the Jingle Bells. I would want to know that.
While we do not have an official way to do this, in your supplies page you can add notes to each of your supplies. Click on the dash ( “-” ) in the notes area and you should be able to enter in some text. Other demos have used the notes option to keep track of the number of items they have for a particular set.