The controller of Joy Co has requested a quick estimate of the manufacturing supplies needed for the Morton Plant for the month of July, when production is expected to be 470,000 units to meet the ending inventory requirements and sales of 475,000 units. Joy Co's budget analyst has the following actual data for the last three months. Using the high-low method to develop a cost estimating equation, the estimate of the needed manufacturing supplies for July would be: (Points : 5) $681,500. $688,750. $749,180. $752,060.