A HIM Department, currently using 2,540 linear filing inches to store records, plans to purchase new open shelf filing units. Each of the shelves in a new 6 shelf unit measures 36 linear filing inches. It is estimated that an additional 400 filing inches should be planned for to allow for 5 year expansion needs. How many new file shelving units should be purchased? A. 11 B. 12 C. 13 D. 14