Here in the central valley, north of Sacramento they are 60 dollars. Winter program will save you 12% on labor and 10% on parts. That runs from December 1 till March 1.
Here in Southwest Ohio my local Deere Dealer is charging approx. $50 per hr. Theres a Deere Dealer thats just lawn equipment and he's $60 per hr. and $40 delivery and pick up charge.
Here in southwestern Il the Deere and NH dealers are both at $42_hour. last I heard the CAT dealer was over $80 but that was for heavy equipment. I don't know if their ag shop is the same rate or not.