This lady hired me yesterday to do her lawn, and she also wants an estimate to mulch her beds. How do you figure a mulch estimate? She needs about 25 yards, and I can get it for $31/yd. Do I mark up the price per yard and/or charge by the hour? What's a decent mark up? Judging by her house, neighborhood, landscape, and stonework she's not scrubbing pots for a living. But I'd hate to mow her lawn while watching some other schmoe mulch her beds because I accidentally try to gouge her. Please help.