I have never edged a bed of mulch before. Can someone please explain to me the easiest way to do so? I DO know what it is, but have never had to do it. Will a flat shovel do the job? How deep do I cut it? Straight cut? Angled? Thanks :| Also, how do you guys do your pricing on edging? We're charging 68/yard for the delivery/installation. Should I charge extra for clean-up (hourly rate maybe)?