Determines whether a sum of accumulated total is performed. Possible values are 0 - rv2NoSR: Does not perform a total calculation (default), 1 - rv2Group: Calculates accumulated totals for each specified interval of totals, or 2 - rv2All: Calculates the accumulated total for all values from a Section Report, regardless of grouping. This property is only valid when the SummaryType property is different from 0 (zero).