NGX + PFPX

Hello guys.

First time that I used PFPX for planning my flight I was not getting a correct weight.

I saw that I should set pax weight to 79 kilos or 175 pounds but, what about baggage ?. If I leave it as a default, ZFW is 3000 kilos over what FMC shows. If I set baggage to 0 KILOS and PAX 79 kilos it works fine and If  I set PX to 69 and bagge to 10 it works fine as well, 

Could you please guys say to me how do you have setted ?

Thanks in advance

Ivan