All you do is add on the effect of each condition i.e
TODR=800m
PA=+40m (20m/1000ft and high elevation increases TO run)
Slope=+30m(15m/1% and upslope will increase distance)
Wind=+50m(10m/1kt and tailwind increases TO run)
Temp=+50m(ISA at 2000ft is 11.04c example is 21c so ISA+10.Warmer air increases distance again)
Hopefully the answer is around 970m. I had a few of these in my performance exam and passed it so hopefully this is the correct method.
Good luck