The cost of energy consumed in producing good units in the Bottling Department of Mountain Springs Water Company was $1,216 and $792 for June and July, respectively. The number of equivalent units produced in June and July was 6,400 and 7,200 liters, respectively. Evaluate the change in the cost of energy between the two months. Energy cost per unit in June (to the nearest cent) $ Energy cost per unit in July (to the nearest cent)