Runaround Corporation sells running shoes and during January they ran production machines for 29,000 hours total and incurred $14,000 in maintenance costs. During July they ran production machines for 11,000 hours total and incurred $6,200 in maintenance costs. Based on this data, what is the variable maintenance cost per machine hour? O A. $0.43 per machine hour O B. $0.44 per machine hour O C. $0.56 per machine hour O D. $1.61 per machine hour