Consider a three-firm supply chain consisting of a retailer, manufacturer, and supplier. The retailer's demand over an 8 -week period was 90 units each of the first 2 weeks, 220 units each of the second 2 weeks, 310 units each of the third 2 weeks, and 420 units each of the fourth 2 weeks. The following table presents the orders placed by each firm in the supply chain. Notice, as is often the case in supply chains due to economies of scale, that total units are the same in each case, but firms further up the supply chain (away from the retailer) place larger, less frequent, orders. Click the icon to view the orders placed by each firm in the supply chain. Click the icon to view the ways of calculating the variance. a) What is the bullwhip measure for the retailer? The bullwhip measure for the retailer is (Enter your response rounded to two decimal places.)