Resource Expenses

All

Using Project 2003. I have to enter a standard resource cost and then apply a daily per diem cost on top of that for a period of time. Eg:

1-31 Jan - £300/day
1-29 Feb - £300/day + £28/day
1-31 Mar - £300/day

I have to differentiate this £28/day cost as an unbillable expense but still need to be recognised as part of the project cost.

What is the easiest way to do this?

Thanks in advance

Dan