The Company defines restaurant-level operating profit to be restaurant revenues minus restaurant-level operating costs, excluding restaurant closures and impairment costs. The measure includes restaurant level occupancy costs, which include fixed rents, percentage rents, common area maintenance charges, real estate and personal property taxes, general liability insurance and other property costs, but excludes depreciation. The measure excludes depreciation and amortization expense, substantially all of which is related to restaurant level assets, because such expenses represent historical sunk costs which do not reflect current cash outlay for the restaurants. The measure also excludes selling, general and administrative costs, and therefore excludes occupancy costs associated with selling, general and administrative functions, and pre-opening costs. The Company excludes restaurant closure costs as they do not represent a component of the efficiency of continuing operations.