June Lucinda Company wants to develop a cost function for its maintenance costs to estimate such costs for the coming year. The following data are wlable. Direct Maintenance Month Labour Hours Costs incurred 4,000 $ 1,200 July 6,750 1.718 August 7.000 1,800 September 5,500 1,290 Using the high-low method, what is the fixed maintenance cost? O $800 $400 $1,200 $900