what would this be?

You are playing the "Root Beer Game" simulation with the above supply chain. The following table displays the inventory levels for all members of the supply chain: Customer walks into the Retailer and orders 90,000 cases of root beer. Members of the chain are allowed to ship partial orders while they wait for the remainder of the order to arrive from upstream in the chain. How many weeks will it take for the Customer to receive their entire order of root beer according to the following specifications