Would it be possible to break the per diem down into what you get for each meal.  The reason for this is we want to offer per diem but if a meal is provided by a customer or sales we need to remove this from the per diem bucket for that day.  

We break down our per diem into:

- Breakfast - 14%

- Lunch 30%

- Dinner 30%

- Incidentals - 25%

Then if an employee has his dinner paid for by a customer then we only give them 70% of the per diem value.  Right now we have to do this in excel and then we just post a single expense line item for the amount they are owed (with a pdf of the excel as the receipt).