small engine labor rates

what are they in your area? I just fixed a neighbors CubCadet mower(MTD) for a self propelled belt popping off problem. It was $40 some in parts. It's a neighbor that gives us veggies every year. He hands me a wad of bills and I'm embarassed to take that much. He's happy with it, says he doesn't have to go out and buy a new one now. I WOULD have bought a new mower before spending what he did. I'm thankful and told him so...but still. What DO these places charge for labor? Thanks! Bob