Gratuity by Waitron at work period report

Hi,

How can I break down gratuity by waitron in Work period reports? 

Im using version 3.0.28, have ticket tags set up with waitron name, have a gratuity tag also.

At present at end of day I have all the gratuities added up on the work period report but would prefer to have them by waitron mane so that its easier to pay out.

any ideas?

H