... DSUM(database,field,criteria) . DSUM function returns the sum of numbers in a column that match conditions specified. @database is a range of cells in which rows of related information are records and columns of data are fields. ... For example, ``Age'' refers to the column with the label ``Age'' in @database range. @criteria is the range of cells which contains the specified conditions. The first row of a @criteria should contain the labels of the fields for which the criterias are for. ...