The Eastern District of Adelson Inc. is organized as a cost center. The budget for the Eastern District of Adelson Inc. for the month ended December 31 is as follows: During December, the costs incurred in the Eastern District were as follows: 1. Prepare a budget performance raport for the manager of the Eastern District of Adelson for the month of December. If an amount box does not renuire an enitry, leave it blarik, or eritar zero " 0 ". 2. For which costs might the manager be expected to request supplemental reports? a. Customer service salaries. b. Customer service salaries and maintenance. c. Customer service and sales salaries as well as maintenance. d. Maintenance