Stop in for a cup of coffee

Ya that's about right $40-50. They do great work but I didn't get a discount. They do tons of work for John Deere here in town.
what is their recommended cycle? Ours was three moths for most of them, some were a month. Really went by the USAF meteorology data base on failures to be re calibrated. They are so cheap now I drop one I just throw it out and get another one.