Please give me a way to see the total of the values in a column in the Jobs table

Like a spreadsheet, it would be good to be able to select a column and display the total of the entries in the selection.  Examples would be pages, sheets, number of documents, but any property that has values that can be added would be good.  Operators who know that 20,000 pages, for example, fill a roll, could select a few jobs to see if they have enough pages for that total.