do they sharpen lawn mower blades and what do they charge

I was not happy with the sharpining service. They only run the belt sander on the blades and do not put a edge on the blade. Leaviving them blunt.

Mower blades sharpened at $4.00 each

Yes

Yes, I believe $6 off the mower and $12 on the mower. I would call to make sure!