Anatomy of a bar tab...

[monsanto]

PINT HEFEWEIZEN 3.75
JOHNNY WALKER BLACK 6.00
BEEF DIP SANDWICH 8.95
POT ROAST SAND 8.75
CROWN ROYAL 5.25
PINT HEFEWEIZEN 3.75
CROWN ROYAL 5.25
JACK DANIELS 5.25
CROWN ROYAL 5.25
CROWN ROYAL 5.25
CROWN ROYAL 5.25
CROWN ROYAL 5.25
CROWN ROYAL 5.25
CROWN ROYAL 5.25
CROWN ROYAL 5.25

Sub-Total 83.70
TAX 1.46
Total 85.16

Person A admits to:
Pot Roast, Hefeweizen(1), and Crown Royal(3)

Person B admits to:
Johnny Walker(1) and Crown Royal(5-6)

Person C admits to:
Beef Dip, Hefeweizen(1), Jack Daniels(1), and Crown Royal(2-3)

Further information: Waitress is presented with this dilemma and the house folds. She says this is what they have and they have no way of changin the tab.

THE QUESTION
What is the proper tab splitting etiquette? Somebody got lucky, but who? Where is there a settlment to be had?

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