I use the Excel function Concatenate things like this. In a new column, click the function icon in Excel and it will show the steps, but basically for Text1, you would choose cell L1, for Text2, type in whatever the divider is (like a -) and then in Text3 choose cell O1. I would replace the blank fields with 00 in Cost Center. Copy the formula down and then highlight all the formulas, choose Copy and then Paste Special, Values right over the top so that the formulas and replaced with text. Then reference the new value for your import.