Add Fixed Costs to Tasks or Template Tasks

I'd like to add fixed costs to specific tasks on the template task object.

At project start we attach a template then delete the tasks/paths we do not need; with this, if we were able to attach fixed costs to tasks, we could delete unneeded tasks and get more accurate cost reporting. It doesn't make sense to add the fixed cost to the template/project because this fixed cost varies based on the vendor we use to complete work.