David,

If you have parent records, you could always de-normalise your design
in the interest of speed and have the sum in the parent record at all times
and simply display that field.

If you do not have parent records, then use SUM to sum the field before
you display your first screen.

Michel.
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>I want to create a field that will display a running total of the sum of another field - like in Quicken where you have your balance shown as a running total and if a transaction gets changed the running total is ajdusted. If any one has a suggestion on where to start it would be greatly appreciated. Thanks.