Hi Elmer,

This is normal, because VFP known only floating point as numeric variable.

try this:

*!*Manually entered same number
&& this number not exist on floating point domain
m.lnTotalAVGmanual = 58271.27004999990000
?str(m.lnTotalAVGmanual-58271,25,16)
* now you known that next number exists on floating point
m.lnTotalAVGmanual= 58271.27004999989731
?str(m.lnTotalAVGmanual-58271,25,16)

* found your sum true number, removing left integer fp number
*The result from SUM was determined by 
?str(m.lnTotalAVG1-58271,25,16)

if you compare the two decimal part of
m.lnTotalAVG-58271
and
m.lnTotalAVG1-58271

you can see the true values.

VFP can do exact sum only on integer and currency fields.

Fabio