First, a word of warning: this process is very trusting of the dates entered. Checks are made only to the point of ensuring valid date formats. It is possible to enter dates that will select nothing, e.g., ending date before starting date, or even to have one run of the process overlap a previous run of this process, e.g., run 1: 07/01/83 to 07/15/83, run 2: 07/15/83 to 07/31/83 duplicates charges for the 15th.