CODE
#ALIAS wdraw {WITHDRAW %eval( %round( %1/(%float( .995))))}
I can't test to see if it works perfectly, but the logic is there. Also, I'm not sure if that's the best way to do it, but the math
x\.995=y
x being the amount desired
y being the amount actually withdrawn to give you the amount desired.
Please lemme know if I did some bad math.