SORRY (Pelm1) THEY GAVE ME $10 EACH ...Igave them $1.00 each...

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    SORRY (Pelm1) THEY GAVE ME $10 EACH ...Igave them $1.00 each change...therefore they outlayed $9.00(thats what they were out of pocket) each = 3x9= 27 plus my $2.00 tip
    27 +2=29


    You are misstating the equation.

    They were out of pocket $9 each and that $27 covered the beer and the tip. The remaining $3 from the initial $30 is back in their pockets as they were each given back $1.

    Look at it another way. Lets say they each had $10 in their pockets to begin with. But instead of giving him $30, they gave him $27. The end result is now the same as your scenario - they each have paid $9 and they each have $1 left in their pockets. The $27 paid for the beer ($25) and $2 tip.
 
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