This site has a lot of helpful information: https://www.yourmechanic.com/article/p0320-obd-ii-trouble-code- ignition-distributor-engine-speed-input-circuit-malfunction-by-jamahl- walker "Quite often, the mistake that is made when diagnosing the P0320 code is replacing the wrong sensor. Sometimes, the crankshaft sensor is replaced when the problem is really the ignition/distributor engine speed sensor. Other times, the crankshaft is replaced when the problem is really the camshaft sensor."
Thank you. Car still at the shop the original repairs $176.00 for labor and $62.95 for parts plus shop supplies and tax for a total of $265.77. Work was for the crankshaft position sensor. Lets see what other sensor they will replace now.
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