Actually just tackled this myself so perhaps I can give back to this forum
Create a file in your data directory called Checkout.cfg
Then customize the following file to suit your parameters. This will print on the checkout form with the tip outs. We found this is a much cleaner system than using the "tipshare" functionality in Aloha which can get reeeealy complex.
Hope this helps.
[JOBCODE 20,26,29]
<FILL(=)>
<VAL(1

OB)>
<VAL(1:LASTNAME)>,<VAL(1:NICKNAME)>
<VAL(1:JOBCODENAME)>,<VAL(1:JOBCODEID)>
<FILL(=)>
Number of Guests: <RIGHT> <VAL(4:#GUESTS)>
Your Total Sales: <RIGHT> <VAL(8:$S)>
Food: <RIGHT> <VAL(7:$S0001)>
Liquor: <RIGHT> <VAL(7:$S0002)>
Beer: <RIGHT> <VAL(7:$S0003)>
Wine: <RIGHT> <VAL(7:$S0004)>
Beverages: <RIGHT> <VAL(7:$S0005)>
Retail: <RIGHT> <VAL(7:$S0006)>
<FILL(=)>
<Center>Suggested Tip Out:
TO Busser: =<RIGHT><VAL(7

($S0001)+($S0002)+($S0003)+($S0004)+($S0005))*0.012)>
TO Bar: =<RIGHT><VAL(7

($S0002)+($S0003)+($S0004))*0.03)>
TO Expo: =<RIGHT><VAL(7

($S0001)+($S0002)+($S0003)+($S0004)+($S0005))*0.0066)>
TO Host: =<RIGHT><VAL(7

($S0001)+($S0002)+($S0003)+($S0004)+($S0005))*0.0033)>
[DEFAULT]
Custom Sales Not required