Charles Lackey operates a bakery in Idaho Falls, Idaho. Because of the size of the store, no new ovens can be added. At a staff meeting, one employee suggested ways to load the ovens differently so that more loaves of bread can be baked at one time. This new process will require that the ovens be loaded by hand, requiring additional manpower. This is the only production change that will be made in order to meet the increased demand. The bakery currently makes 1,500 loaves per month. Employees are paid $8 per hour. In addition to the labor cost, Charles also has a constant utility cost per month of $750 a per loaf ingredient cost of $0.50. Current multifactor productivity for 640 work hours per month = After increasing the number of work hours to 864 per month, the multifactor productivity=