Grayson Company's high and low level of activity last year was 9,800 units of product produced in May and 6,800 units produced in November. Machine maintenance costs were $6,500 in May and $5,000 in November. Use the high-low method to determine an estimate of the total maintenance cost for a month in which production is expected to be 1,150 units. $1,600 $575 $2,175 $0.50