Attach Transaction Codes to Mobile Timeclock

I would like a function where the teacher can attach a transaction code to the mobile time-clock so I can keep track of the amount of wages I am paying out to each revenue stream. I am able to track my revenue easily via transaction codes & the transaction code summary report, but each month I have to go through my teacher's timeclock entries and calculate how much I paid for each service -- events, birthday parties, classes, etc.