2. Grawburg Inc . maintains a call center to take orders , answer questions , and handle complaints . The costs of the call center for a number of recent months are listed below :" Calls Taken\\ Call Center Cost April 7560 $ 81, 960 May 7529 81 , 773 June 7570 82, 025 July 7568 81, 997 August 7535 81, 816 September 7549 81, 895 October 7592 82, 156