Marina Manufacturing is considering buying new equipment for its factory. The new equipment will reduce variable labor costs but increase depreciation expense. Contribution margin is expected to increase from $250,000 to $300,000. Net income is expected to remain the same at $100,000. Compute the degree of operating leverage before and after the purchase of the new equipment and interpret your results.

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?