Hey and welcome to the board. That sounds like it will be a nice car.
That price wouldn't be Invoice PLUS MSRP.

That would be over $30K.
That sounds like a good deal though. MSRP for the LX is $19,200
For options...check here for accesories. I'm sure the dealer is charging more than $40 for a shift knob.
http://www.handa-accessories.com/accint03.html