The only downside of a general "upcharge" type button is that even though your
overall liquor cost evens out, the actual call liquor you're using doesn't get
accounted for.
--
Cheers! - Josh @ BarSim
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http://www.barsim.com
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BarSim (tm) - The Ultimate Bartending Simulation
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All About Bartending - The Blog http://allaboutbartending.blogspot.com/