I am trying to add a custom column (B) -Let's Call it "Persons" - that will multiply against the "Qty" - I'd Call this "Qty/Hrs" - column (A), and the "Unit Price" Column (C) for the constructioncompany that I manage. I made a excel sheet that has it, which we've been using, but I'd like to move fully to NCH Invoicing Software. So, the reason for this is that I can multiply the amount of hours "x" that "y" amount of employees worked on a specific project, on which to charge the unit price of "z" amount of dollars per hour. For Example: 4 men worked 12 hours on a project on which each man was charging $35 per hour. To use the first figures, the (A) Column above would equal 12. (B) Column=4, and (C)=35. For a total of 1,680. How can I add this column (B) which the "total" column would multiply?