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.
The cost of a bartender will depend on how many people are going to be attending the party, the date of the event, geographical location and individual/company you choose. Most personal bartenders will want to serve 50-75 guests at a maximum, so for every 75 guests, you will want to factor an additional bartender. On average, expect to pay anywhere from $15 to $50+ per hour. Most will require you book in four-hour increments. These rates can be 30 to 50 percent more if planned on a holiday.