Sums the reported amount within a range of dates.
RPTAMTSUM("RptAmtName", StartDate, EndDate, MatchType)
"RptAmtName": the name of the Reported Amount that is being analyzed. This name must be enclosed in quotes.
StartDate: starting date for which the reported amounts are to be summed.
EndDate: ending date for which the reported amounts are to be summed.
MatchType: choose from the following:
RPTAMTSUM("HOURS", DATE(1,1,2015), DATE(12,31,2015), 0): sums hours with effective dates between 1/1/2015 and 12/31/2015.