this is accounting homework, and could you please solve and explain step by step? Thank you. Marla Mason owns and operates a home health care agency. She reported the following cost information for the first four months in 2013. Identify each of the following costs as fixed, variable, or mixed and calculate the missing values.

--------------------------------------------------home visit hours----------------------- .....................................................10,000..........12,500..........15,000 ...........17,500 medical records automation and storage..............................$3,000................?..............$4,250.............$4875 Medical testing supplies.........$7,500..........$9,375................?..................$13,125 Insurance filling services.......$4,000..........$5,000.........$6,000................?......... Communications system lease...?...............$2,000...............?................$2,000