Yes, the base quote for this seems reasonable for a SX AWD + Nightfall +
Floormats. See attached and how the number for that build on the Kia website matches up exactly with the first line in your quote. (I saw your FB post too which hinted at what you were looking to buy).
So the MSRP number is right, and it looks like the remaining details in the quote are the usual doc fees, registration, and taxes, which gets you to $50.8k. Again, this number seems reasonable.
The jump to 56k seems to be based on your financing (72 mos at 3.9%, with 2k down). If you want that number to come down you should take shorter loan with a lower rate. It would mean higher monthly payments but less overall total.
Long story short - I don’t see a problem here. It’s a fair MSRP quote, the taxes seem normal, and the effects of financing is up to you.