In a process cost system, the amount of work in process inventory at the end of a period is valued by a. summing the costs remaining in each department account at the end of the period. b. summing all actual costs that flowed through the department from the beginning to the end of the period. c. summing estimated costs budgeted for the inventory during the period. d. All of these choices are correct.

Google started as one of many internet search engines, amazon started as an online book seller, and ebay began as a site where people could sell used personal items in auctions. these firms have grown to be so large and dominant that they are facing antitrust scrutiny from competition regulators in the us and elsewhere. did these online giants grow by fairly beating competition, or did they use unfair advantages? are there any clouds on the horizon for these firms -- could they face diseconomies of scale or diseconomies of scope as they continue to grow? if so, what factors may limit their continued growth?