I have a commercial triple net lease and my landlord provides me with a typed list of the operating expenses. I have repeatedly asked to see the bills that supposedly represent these expenses, and they have been putting me off for 4 months now, but they want me to sign a new lease (current one is up Jan. 2011). I do not want to sign a new lease until i can see for myself that they are billing me correctly. Because of all their "stalling", I am becoming more and more suspicious. What rights to I have to see and verify what they are charging me? They also charge me an additional 20% of the operating expenses. Is this normal?