[ic] add fixed weight onto shipping weight total

[interchange-users@icdevgroup.org (Jeff Dafoe)]

    Would someone know offhand how to add a fixed weight amount to the
shipping weight total?  I charge customers exactly what it costs me to ship
merchandise, I have all of the items 'correct weight entered into IC, and
everything is ultra-accurate except that I need to have the weight of the
box and packing material (a constant value) added in to the total weight.  I
am using the UPS-style lookup table.


Thanks,
Jeff