Is $1200 for adapter housing gasket,pressure control solenoid&engine mount fair?

P1811 max adpt long shift (this solution was replace pressure control solenoid & service transmission for $700 + tax.) The other was found oil filter adapter gasket leaking (solution was oil filter & adapter housing gasket $220 + tax.) Then had to add oil & filter change for another $36.34. Also found engine mount broken (add another $230.) Vent evap vent solenoid stuck open ($130.) The only actual code they gave me was the first one I listed. I'm not familiar with how much labor is involved to replace PC solenoid and service transmission but must be enormous if labor cost is almost $500 of the total. Please advise.