I have searched and found some answers, but it just does not seem right. I am hoping you guys can clarify this for me. What I have is natural area that is in the shape of a triangle 129' long side, 82', 54' base. New bed so I want 3" cover. I keep coming up with 42-43yds. At 28dollars(for the customer) a yd, thats like 1200 dollars for mulch not installed. Please tell me what the h@ll I am doing wrong. This is also only 2/3 of the job for the homeowner. Thanks everyone on here for your constant help for a noobie.