>I have a field called DollarAmt on a report, along with a running total of DollarAmt into a field called Ord_Tot:
>

> DollarAmt  Ord_Tot
>-------------------------------
>   659.75       659.75
> 9,566.20    10,225.95
> 3,380.00    13,605.95
> 3,450.00    17,055.95
>13,316.00    30,371.95
>
>

>
>How do I create this running total in a query?

What is the table structure?
Basically you could self join table and get what you want.