The data below have been taken from the cost records of the hospital.The data relates to the costs of admitting patients at various levels of patient activity.

Month Number of Patients Admitted Admitting Department Costs January 3.600 $29,400 February 3,800 $30,400 March 2,900 $27,400 April 3,200 $28,000 May 3,300 $28,600 June 2,600 $26,200 July 2,200 $25,600 August 3,500 $29,200