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Runaround Corporation sells running shoes and during January they ran production machines for 27,000 hours total and incurred $9,000 in maintenance costs. During July they ran production machines for 11,000 hours total and incured $7,200 in maintenance costs. Based on this data, what is the variable maintenanoe cost per machine hour? OA $0.11 per machine hour O B. $1.69 per machine hour O C. $0.80 per machine hour O D. $0.65 per machine hour te