I'd really like to know the thought process of this calculated 10-percent tipper

As a bartender, I'm quite used to getting 10-percent tips from time to time.  There are many people out there who subscribe to the "dollar a drink" theory of tipping, and since I work in a place where drinks often cost $10, that's how the math works out.  At least once per night I'll run a credit card for $10.70 (the price of $10 cocktail with seven percent sales tax) and receive a $1 tip on the signed slip.

While I personally believe 20 percent should be the standard bar tip rate regardless of what is purchased, that's not the point of this blog.  Take a look at this receipt from the other night:

At first glance I was extremely confused.  It's fairly rare for someone to include a tip of anything other than full dollar amounts.  On occasion people use 50-cent increments, or write in the change to make the final total an exact dollar value.  But adding 68 cents to 75 cents to get 43 cents?  That made no sense (pun intended)...

That is, until I realized it was a calculated 10-percent tip down to the penny.  In all my years of bartending I'd never actually seen this before.  What's the point?

I might understand if I'd really pissed the guy off or something, but I'm pretty certain I would've picked up on that and I don't believe it was the case.  No, I think this guy is just very passionate in his belief that bartenders should be tipped exactly 10 percent.  I wish I could ask him and find out.

Honestly, not knowing the thought process behind it is bugging me a lot more than getting the bad tip in the first place.

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