Expressions can also use variables. Variables have a Variant data type and the expression evaluator converts the data type of a variable from a Variant subtype to an Integration Services data type before it evaluates the expression. Variables can use only a subset of the Integration Services data types.
The total COST of each cocktail using 2oz whiskey per drink and using the higher estimate of $90 to buy all ingredients, the startup cost comes out to about $7.5/cocktail. After that first bottle of whiskey is gone, you will surely have PLENTY of the other ingredients left.
If your bar pours 1.25 ounce shots, you'll get 20 shots per bottle, with about one-third of a shot left. If the whiskey costs you $15 per bottle, your pour cost is 75 cents. When you sell that shot for $4, you're achieving an 18.75 percent pour cost and an 81.25 percent gross profit margin.