In a March 7 editorial, the Washington Post notes that domestic steel producers argue that "they are the world's most efficient producers and that foreign producers are robbing them of customers by selling for less than their cost of manufacture." The editorial continues, "But America's steelmakers are actually among the highest-cost producers in the world"

a) Please comment. Could domestic steel producers simultaneously be the most efficient and the more expensive producers in the world?

b)Which equation can help to solve this puzzle of efficiency and high cost?