Any option you have results in paying off the loan. Whether that is by trade, private party sale, or payoff. Given the market trend, you probably won't get what was paid for it.

Your interest calculation. It's just wrong. The 6.94 rate is per year. On a monthly basis you have around .55% of the load balance added to the remaining principal to find the interest accrued.

You end up paying that much in dealer markup (pure profit over MSRP), add on packages, service contracts, plus fees as you mention. You get to this point by not knowing what was being signed and being sold a bunch of things they probably didn't need.