Using activity analysis, Arnoldson Company has identified the appropriate cost driver for maintenance costs in a factory as the number of machine hours. The maintenance costs have been observed as follows within the relevant range of 5,000 to 8,000 machine-hours. Month Maintenance Cost Machine Hours January $7,900 5,600 February $8,500 7,100 March $7,400 5,000 April $8,200 6,500 May $9,100 7,300 June $9,800 8,000 July $7,800 6,200 Estimate the variable cost per machine hour. Answer: