I'm going to try to show how I would do this.
TblTimeClock
PunchRecord TimeIn TimeOut
autonumber date/time date/time
on the report I would have an ubound text box whose source would be the DSum of (TimeIn - TimeOut)*Wage, I don't remember the specifics of DSums arguments I dont use it much. So just hit F1 and lookup DSum
Of Course I don't know if you have a table set up for wages, or if it's case by case. If I had a bunch of people making minimum I may make a table for wages. I'm a bit sketchy but I'm not sure what you've got.