The firm sells gyros. the cost of ingredients (pita, meat, spices, etc.) to make a gyro is $2.00. the firm pays its employees $60 per day. she also incurs a fixed cost of $120 per day. calculate the firm's variable cost per day when it produces 50 gyros using two workers?

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?