Annually, depreciation and interest costs total $9,900 (($18.70 per hour depreciation + $14.30 per hour interest) x 300 hours). These $9,900 of costs are incurred by owning the tractor and do not change with annual use. On a per hour basis, depreciation and interest costs increase as hours of use decrease. At 150 hours of use, for example, depreciation and interest costs equal $66 per hour ($9,900 / 150 hours).
Step 15 Revise your full draft. If you have already written a first draft, move on to revising. Note: If you'd like, you can begin by printing out one of your responses from getting started. You may have written an outline or started with freewriting or just jotted down some notes.
1 Donât write your thoughts down in details. Usually it is enough to write down a couple of concise sentences to be able to return to a certain idea later without losing the discourse.  Donât consider crafting a first draft of an essay as unnecessary. Even if you have an outline written, a draft is still necessary; while an outline helps you to figure out what to write about, the first draft can help you understand how to write. The first draft helps you to shape out your thoughts, and thus is a crucial part of the essay writing process.