It's also TRUNC() not FLOOR() (not that it probably matters). For example, pop growth:

Min(BioFactor*Trunc(Round((MaxPop-CurrentPop),0)/3,0),BioFactor*Max(40,Round(0.03*(1-Taxrate)*CurrentPop),0))

and loss:

Min(Round(BioFactor*(0.05+0.15*Taxrate)*CurrentPop,0),Trunc(BioFactor*Round((CurrentPop-MaxPop),0)/3,0))

Pang has lots of junk in his Trunc. The NW formula is just =Trunc((Troops*0.5)+(Jets*0.6)+(Turrets*0.6)+(Tanks*2)+(Spies*1)+(Tech*2)+(Land*45)+(Buildings*35)+(Money/20000)+(Food/1000)+(Missles*2500)+(Pop/6)+(Oil/100))