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.
Example - 2 drinks per person for one hour of cocktail plus 5 drinks per person for a reception lasting for five hours adds up to 7 drinks per person. Multiply 7 by the cost of the median expensive drink in the bar package to estimate the average cost per person.