Meg,
If you have costs on a task as a result of entering a fixed cost figure or
arising from an assigned resource with a cost rate of more than $0.00
Microsoft Project will calculate actual cost for you as you update progress
on the task. By default costs are accrued on a pro-rata basis. So if you
have a task with a $50 fixed cost and a total cost of $100 due to there
being resource costs of $50 and the task is marked as being 50% complete the
actual and remaining cost values will be calculated as being $50.
Once a task is complete you can edit the actual cost figure at the task
level to be whatever you want.
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Dominic Moss
Projectability - Helping People achieve more with Microsoft Project
www.projectability.co.uk