The LEED certified building that I work in is a sports arena. The massive variety and quantity of our purchases, especially in ongoing consumables and food & beverage products is mindboggling. Are we required to track each individual item puchased? Or can we lump all non-sustainable purchases into one category, all regionally sustainable purchases in another and then track individual line items of suppliers that do not fall wholly into on category or the other? Any advice would be greatly appreciated. Thank you!