Obj. 1 Williams Optical Inc. is considering a new lean product cell. The present manufacturing approach produces a product in four separate steps. The production batch sizes are 45 units. The process time for each step is as follows: The time required to move each batch between steps is 5 minutes. In addition, the time to move raw materials to Process Step 1 is also 5 minutes, and the time to move completed units from Process Step 4 to finished goods inventory is 5 minutes. The new lean layout will allow the company to reduce the batch sizes from 45 units tor 8 unfis. The time required to move each batch between steps and the inventory locations will be