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.
Here is a rough estimate for you. *10 people will consume about 20 of the typical 1.5oz shots of hard liquor at the average cocktail party. For a full evening I would estimate closer to 40 1.5oz shots. *5 bottles of wine for every 10 people. You should get roughly 5 servings per bottle. *5 six-packs of beer for about ten people.