This class holds information about the sums of a list of origin entries. This information includes
total credit amount, debit amount, other amount, number of credit entries, number of debit entries,
and number of "other" entries
This method adds amount from origin entries and increments number totals for the appropriate type
(i.e. credit, debit, or other).
Parameters: entries -
Adds up the values in the parameter totals object to the corresponding fields in this object
Parameters: anotherTotals - another OriginEntryTotals to add to this OriginEntryTotals totals