Ted begins the month with a checking account balance of $1,400. He writes five checks: one for $350.45, one for $200.01, one for $11.53, one
for $68.10, and one for $177.37. He makes two deposits, each for $450. His
bank charges him a $0.25 fee for each check she writes. He also pays a
monthly account fee of $5.00. What is the balance of Ted's account at the
end of the month?*
$1,486.29
$1,325.76
O $1,401.12
$1,509.34

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?