Formula conditional on weight,center grav, give a trim setting
 

Weight between 50000 to 75000 (need to auto calc for all weights in between)
Index (center of gravity) between -1.0 to -20.4 (need to calc for all dec.
pts in between)
Trim settings needed, have the hard numbers for certain index's and weights.
but need to auto calc for others.
There would be no room for a table, as this will go on a PDA.
Any help would be great, I realize this may be a bit vague, tried to paste
the "table i made" but looked like a mess.