Mitch Margo (born May 25, 1947) is an American singer and songwriter who was a professional recording artist by the age of 14.
 Along with brother Phil Margo), he was, and still is, a member of The Tokens.
 The vocal group is best known for its hit recording of "The Lion Sleeps Tonight", which rose to #1 on the "Billboard" Hot 100 and remained there for 3 weeks in 1961.
 Other hits by The Tokens include: "Tonight I Fell In Love" (which Mitch Margo co-wrote), "I hear Trumpets Blow" (written by Mitch Margo), "He’s In Town", and "Portrait of My Love".
 The Tokens are still recording and performing.
 Their schedule includes venues such as The Riviera in Las Vegas, Epcot in Walt Disney World, Orlando, Florida, and much more.
Croesor Quarry is a large underground slate mine in north Wales which was served by Croesor Tramway.
 Small scale quarrying began in the 1840s, and by 1861, there were two companies in operation.
 They amalgamated in 1865, a year after the quarry was connected to the newly opened Croesor Tramway.
 Much money was invested in development work, but volumes of useful slate produced were small, amounting to just 226 tons in 1868.
 Access to the underground workings was by a single adit, and the surface mill was powered by two water wheels.
 A change of ownership in 1875 did little to improve the profitability of the quarry, and it closed in 1878 or 1882.
The Tokens are an American male doo-wop-style vocal group and record production company group from Brooklyn, New York.
 They are known best for their chart-topping 1961 single, "The Lion Sleeps Tonight" (   ).
Deadwood is a board game for 3-8 players produced by Cheapass Games.
 In it, players assume the roles of bit actors working for a B-Movie Studio who try to make as much money as possible.
 This is done by taking on roles such as "man on fire," "woman in black dress," and "falls off roof."
 Players are represented by dice, which denote what "level" actor each player is.
 The original version of the game was available through various game outlets.
 The rules, boards, and cards for a revised edition ("Deadwood 2.0") are now available for free download from the company's website, and are being developed into a deluxe edition via Kickstarter.
Women in film describes the role of women as film directors, actresses, cinematographers, film producers, film critics, and other film industry professions.
 The work of women film scholars, including feminist film theorists is also described.
 Women are statistically underrepresented in creative positions in the center of the US film industry, Hollywood.
 This underrepresentation has been called the "celluloid ceiling", a variant on the employment discrimination term "glass ceiling".
 In 2013, the "...top-paid actors...made 2½ times as much money as the top-paid actresses." "
[O]lder [male] actors make more than their female equals" in age, with "female movie stars mak[ing] the most money on average per film at age 34, while male stars earn the most at 51."
 In 2013, 9% of directors were women.
 A woman director won the Academy Award for Best Director for the first time when Kathryn Bigelow won for "The Hurt Locker" (2009).
"The Lion Sleeps Tonight", also known as "In The Jungle", or any of "Wimoweh", "Wimba Way" or "Awimbawe", is a song written and recorded originally by Solomon Linda with the Evening Birds for the South African Gallo Record Company in 1939, under the title "Mbube".
 Composed in Zulu, it was adapted and covered internationally by many 1950's and 60's pop and folk revival artists, including the Weavers, Jimmy Dorsey, Yma Sumac, Miriam Makeba and the Kingston Trio.
 In 1961, it became a number one hit in the United States as adapted in English with the best-known version by the doo-wop group the Tokens.
 It went on to earn at least US$15 million in royalties from cover versions and film licensing.
Philip "Phil" Margo (born April 1, 1942, Brooklyn, New York) is an American musician and author who, along with his brother Mitch Margo is a member of The Tokens.
 They are best known for their hit recording of "The Lion Sleeps Tonight" which rose to #1 on the "Billboard" Hot 100 and remained there for three weeks in 1961.
 Other hits by The Tokens included "Tonight I Fell In Love", "I Hear Trumpets Blow", "He's In Town" and "Portrait of My Love".
 The Tokens are still recording and performing.
 Their schedule includes venues such as The Riviera in Las Vegas, Nevada and Epcot (Walt Disney World, Orlando, Florida).
Whammy!
 (subtitled "The All-New "Press Your Luck for its first season) is an American television game show that aired new episodes on Game Show Network from April 15, 2002 to December 5, 2003.
 The main goal of the game is to earn as much money and prizes as possible through collecting spins by answering trivia questions correctly, then using those spins on a gameboard to win various prizes and cash amounts while attempting to avoid the show's eponymous character, the "Whammy."
 Contestants who do land on a Whammy lose all their prizes accumulated to that point; four Whammies eliminates a contestant from the game.
 The program is an updated version of "Press Your Luck", which originally aired on CBS in 1983–86.
 The series was taped at Tribune Studios and was hosted by Todd Newton, with Gary Kroeger announcing.
Bridge Magazine is a British monthly magazine devoted to the game of contract bridge.
 Now published by Chess & Bridge Limited, it is the oldest such magazine having been established first in 1926 by A.E. Manning-Foster.
 It was not published during World War II, so it has had fewer issues than "The Bridge World".
 "Bridge Plus", a monthly magazine that was published between 1999 and 2008, has been incorporated into "Bridge Magazine".
 In the June 2013 issue, the editor announced that in future the magazine would only be published online because the paper version had been losing too much money.
"White Girl" is the debut single by hip hop trio U.S.D.A. from their debut album "Cold Summer".
 The song was named after the slang term for cocaine, "White Girl".
 Throughout the song the group talks about how much money they have obtained from selling the drug.

Question: The Tokens are best known for their version of a single that has earned at least how much money in royalties?
Answer: US$15 million