A company uses the weighted-average method for inventory costing. During a period, Department Z finished and transferred 45,000 units to Department A. Also in Department Z during the period, 10,000 units were started but brought only to a stage of being 27% completed. The number of equivalent units produced (EUP) by Department Z during the period was .

In which of the following games is it clearly the case that the cooperative outcome of the game is good for the two players and bad for society? a. two oil companies own adjacent oil fields over a common pool of oil, and each company decides whether to drill one well or two wells.b. two airlines dominate air travel between city a and city b, and each airline decides whether to charge a "high" airfare or a "low" airfare on flights between those two cities.c. two superpowers decide whether to build new weapons or to disarm.d. in all of the above cases, the cooperative outcome of the game is good for the two players and bad for society