The "real" answer is complex and involves effective planning of tasks, work
effort, resources, resource unit costs, plus fixed costs.
If you are not going to track planned and actual work for resources, the
simple answer may be:
Show the Fixed Cost column on a table and enter your budget values into that
field for each task. Enter actuals into the Actual Cost column. But don't
resource load or collect actual hours, or your AC will be overwritten.
Anyone out there, feel free to correct me if this is bad advice.
Richard :>)