Marla Mason owns and operates a home health care agency. She reported the following cost information for the first four months in 2017. Home Visit Hours 10,000 12,500 15,000 17,500 Medical records automation and storage $3,000 ? $4,250 $4,875 Medical testing supplies Insurance filing services $7,500 $4,000 $9,375 ? $13,125 $5,000 $6,000 ? Communications system lease ? $2,000 ? $2,000 Identify each of the following costs as fixed, variable, or mixed. Items Medical records automation and storage Medical testing supplies Type of Cost Insurance filing services Communications system lease