Start by Selecting a Category. For more info, hover your mouse over the blue button below. Inventory can be done in many ways. For example, Breakfast counts up how many have been sold from a given time period. Lunch: you start out with a given number of items then it counts down how many have been sold. Dinner is a combination of both methods. The Bar only has a few items accounted for. Happy Hour uses percentages of items sold. You can account for very detailed percentages of bottles used for Spirits.