Overheating issues. Was looking for book time to replace thermostats is all.
I don't know the exact book time (don't have access to that information), but I'd be charging two hours labour for the thermostat.
You also need to factor in replacement coolant (plus disposal), etc. Plus diagnostic time; no decent mechanic will just take your word for it - "It's overheating, please change the thermostat"; they'd want to find out why it's overheating, and cure the actual problem, whatever it might be.