1 . 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