The performance report should be comprehensive for each responsibility center. For example, a sales district performance report should show(1) performance in generating sales revenue, (2) performance in controlling district distributed expenses, and (3) performance of other related activities under the direct control of the district sales manager. The performance report should compare actual results with planned results and report the variances. Normally, the report should show both the period just ended and cumulative to date. Performance reports should be consistent with the pyramiding p principle. That is, the performance reports for the lowest level of management should report specific revenues and expenses by detailed classifications (products in the case of sales and nature in the case of expenses). For each higher level of management, the pyramiding effect requires summary performance reports that show totals by responsibility center, This type of performance report is illustrated in the comprehensive demonstration case, Superior Manufacturing Company (see Chapter 15).