A rollercoaster $(369$kg$)$ moves from A $(8\mathrm{.}41$m above the ground$)$ to B $(21\mathrm{.}8$m above the ground$).$ Two non$-$conservative forces are present: friction does $-1\mathrm{.}23$ x $10^4$ J work on the car, and a chain mechanism does $+4\mathrm{.}37$ x $10^4$ J of work to help the car up a long climb. What is the change in the cars kinetic energy from A to B$?$