5) The total production of the dairy is 12000 liters of milk per month (assume 30 days) and is uniform. The milk is filled into liter boxes, which are then delivered. Fixed costs associated with one order of any size are 800 CZK. Daily storage costs per box are CZK 0.20. If there is a shortage of boxes in the warehouse, it will cause a loss, the amount of which has been calculated at CZK 1.20 per box and per day. A) Determine the optimal delivery size, total monthly costs in case of the optimal strategy, and the length of the delivery cycle. B) What is the optimal amount of unsatisfied demand and the maximum amount of stock in the warehouse. C) What is the reorder point if the delivery time is 2 days. D) What percentage of the total time the storehouse is empty?