Depends how the customer wants it, I mean if she's bending over in front of you practically begging for it I say give it to her good and hard but otherwise play it slow and long. Oh yeah, yeah, estimating the square footage requires frequent close inspections, with the customer. Absolutely, especially for mulch. Depends if she's hot, too. And receptive to the idea, of course, that always helps. Never know, she might go for a lot more than 3 inches. But if that's all you got, that's all you got.