Shona has attended:
Project Intro Intermediate course
Costs
How can I use MS Project to track billing & expenses?
RE: Costs
You can use custom fields to enter cumulative amounts for resources and then a calculated field to total them up and include them in Budget Totals. We cover this in the advanced course.
There are add-ins you can purchase to do this for you - visit the Microsoft website for details of these.
Alan