Cost resources provide an easy way of applying miscellaneous or multiple costs to a task, like airfare and dining— in addition to the more commonly applied costs like people’s salaries or per-use costs, such as consultant fees.
Cost resources don’t depend upon the amount of work done on tasks. Nor do they depend on any calendars used in the project, as do work resource salaries, or rate costs for material resources, such as computer time and rental machinery.
Let’s look at this a little more closely since cost resources are created differently than the other costs, and they are applied differently as well.
First, off to the Resource Sheet to create a few cost resources. In Project 2010, click the View tab, and then click click Resource Sheet. In Project 2007, click the View menu, and then click Resource sheet.
Keep one important thing in mind as you use cost resources: You can reuse the same cost resource. That is, If two tasks require two different plane trips and thus two different airfares, simply use one value for the cost resource as applied to one task, and a different value for the same cost resource as applied to the other task. Make sense? If not, leave a comment, and I’ll try to clear up any confusion.
Good Article, I've actually looked for something like this in the past and hadn't found a way to.
This is a very usefull blog, I hope you keep updating it.