Frazier Manufacturing Company collected the following production data for the past month: Units Produced 1,600 1,300 1,500 1,100 Total Cost $66,000 56,100 62,700 49,500 If the high-low method is used, what is the monthly total cost equation? Total cost = $16,500 + $30/unit Total cost = $0+ $45/unit Total cost = $13,200 + $33/unit Total cost = $9.900 + $36/unit