Adidastar Company has costs for maintaining machines during machine hours as follows: Month Cost/Month Machine hours July 91,000 2,000 August 104,000 3,000 September 123,000 4,200 October 115,000 3,600 November 82,500 1,500 December 2,200 Required: 1. Compute the variable costs and fixed costs. 2. Create the equations for this business. 3. Estimated cost based on machine hours for December, with 2,200 machine hours.