Runaround Corporation sells running shoes and during January they ran production machines for 20,000 hours total and incurred $9,000 in maintenance costs. During July they ran production machines for 14,000 hours total and incurred $7,200 in maintenance costs. Based on this data, what is the cost formula for maintenance costs? y = $0.30 X + $3,000 y = $3.33 X + $57,600 y = $0.45 X + $4,500 Cannot determine from the information given