Miketango:
The $52 to which we refer is a Standard Meal Allowance that applies only to transportation workers, including drivers, that are away from home long enough to require a rest before returning home.
I divide my days in quarters but anything is acceptable as long as you are consistent. If I am away during any portion of a quarter day, I count it as a whole quarter. Example: If I leave home today, 2 Jan, at 0800 and return home at 1200 on 4 Jan, I will take the following allowance deduction:
2 Jan = 3/4 x $52 = $39
3 Jan = 4/4 x $52 = $52
4 Jan = 2/4 x $52 = $26