In aggregate production planning, given the following: Based on these information, what is the ending inventory (in units) at the end of February? A. 20 B. 40 C. 55 D. Not enough information given to answer this question E. None of the above Which one of the following forecasting methods is NOT based on historical data? A. Delphi method B. Exponential smoothing method C. A and B D. Simple n-period moving average method E. Weighted n-period moving average method In aggregate production planning, a level production plan A. Maximize both inventory-related costs and labor-related costs. B. Maximize inventory-related costs and minimize labor-related costs C. Minimize both inventory-related costs and labor-related costs D. Minimize inventory-related costs and maximize labor-related costs E. None of the above