HOW MUCH WOULD LABOR ONLY COST TO REPLACE ENGINE

What is your question?

The mechanic told me I have a blown gasket and crack in block? with water and coolant getting into engine. He tried gasket sealant many times with flushing out water/coolant each time but the sealant did not work. HE said I need engine replacement. I have found prices for a used engine but I also need labor cost to swap out old with replacement. Can you give me an idea of what it will cost for that labor? Thanks for your help.

What makes this problem better or worse?

Engine has blown gasket & crack in block per mechanic. He said engine needs to be replaced.

How long has your 2000 Chevrolet Malibu had this problem?

It just happened so I had car towed to mechanic.