Solve the following sql problem:
Which brand of root beer has the lowest unit profit available to wholesalers? Indicate the ID of the customer that has the highest number of purchases of the said brand.

Schema:
SCHEMA:
- Table: customers
  - Column: CustomerID
    - Samples: [101811, 103508, 104939, 105549, 105771]
  - Column: First
    - Samples: [Kenneth, Madeleine, Damen, Kevin, John]
  - Column: Last
    - Samples: [Walton, Jones, Wheeler, Gilbert, Young]
  - Column: StreetAddress
    - Samples: [6715 Commonwealth Dr, 3603 Leola Way, 6740 Branwood Way, 3198 Livingston Way, 663 Westward Way]
  - Column: City
    - Samples: [Sacramento, Sacramento, Orangevale, Folsom, Sacramento]
  - Column: State
    - Samples: [CA, CA, CA, CA, CA]
  - Column: ZipCode
    - Samples: [94256, 94258, 95662, 95671, 95899]
  - Column: Email
    - Samples: [walton.k76@fastmail.com, j_madeleine@gmail.com, dwheeler@outlook.com, kgilbert@fastmail.com, john.y90@mail.com]
  - Column: PhoneNumber
    - Samples: [(916) 918-1561, (916) 186-9423, (916) 164-1156, (916) 304-9859, (916) 730-6109]
  - Column: FirstPurchaseDate
    - Samples: [2013-05-30, 2013-02-06, 2013-04-11, 2013-02-28, 2013-09-05]
  - Column: SubscribedToEmailList
    - Samples: [FALSE, FALSE, FALSE, TRUE, TRUE]
  - Column: Gender
    - Samples: [M, F, M, M, M]
- Table: geolocation
  - Column: LocationID
    - Samples: [0, 1, 2]
  - Column: Latitude
    - Samples: [0.0, 38.566129, 38.559615]
  - Column: Longitude
    - Samples: [0.0, -121.426432, -121.42243]
- Table: location
  - Column: LocationID
    - Samples: [0, 1, 2]
  - Column: LocationName
    - Samples: [LOST, Sac State American River Courtyard, Sac State Union]
  - Column: StreetAddress
    - Samples: [None, 6000 J St, 6000 J St]
  - Column: City
    - Samples: [None, Sacramento, Sacramento]
  - Column: State
    - Samples: [None, CA, CA]
  - Column: ZipCode
    - Samples: [None, 95819, 95819]
- Table: rootbeerbrand
  - Column: BrandID
    - Samples: [10001, 10002, 10003, 10004, 10005]
  - Column: BrandName
    - Samples: [A&W, A.J. Stephans, Abita, Barq's, Bedfords]
  - Column: FirstBrewedYear
    - Samples: [1919, 1926, 1986, 1898, 1984]
  - Column: BreweryName
    - Samples: [Dr Pepper Snapple Group, AJ Stephans Beverages, Abita Brewery, Coca-Cola, Northwest Soda Works]
  - Column: City
    - Samples: [Lodi, Fall River, Covington, New Orleans, Port Angeles]
  - Column: State
    - Samples: [CA, MA, LA, LA, WA]
  - Column: Country
    - Samples: [United States, United States, United States, United States, United States]
  - Column: Description
    - Samples: [After setting up the first A&W Root Beer stand in California in 1919, ..., AJ Stephans Company makes 
the finest elixirs and mixers in New Englan..., Abita Root Beer is made with a hot mix process using spring water, her..., Since 1898 Barq's root beer has had a simple slogan - DRINK BARQ'S. IT..., Always ice cold, “never with ice”. (truncated)]
  - Column: CaneSugar
    - Samples: [FALSE, TRUE, TRUE, FALSE, TRUE]
  - Column: CornSyrup
    - Samples: [TRUE, FALSE, FALSE, TRUE, FALSE]
  - Column: Honey
    - Samples: [FALSE, FALSE, FALSE, FALSE, FALSE]
  - Column: ArtificialSweetener
    - Samples: [FALSE, FALSE, FALSE, FALSE, FALSE]
  - Column: Caffeinated
    - Samples: [FALSE, FALSE, FALSE, TRUE, FALSE]
  - Column: Alcoholic
    - Samples: [FALSE, FALSE, FALSE, FALSE, FALSE]
  - Column: AvailableInCans
    - Samples: [TRUE, FALSE, FALSE, TRUE, FALSE]
  - Column: AvailableInBottles
    - Samples: [FALSE, TRUE, TRUE, FALSE, TRUE]
  - Column: AvailableInKegs
    - Samples: [FALSE, FALSE, FALSE, FALSE, FALSE]
  - Column: Website
    - Samples: [http://www.rootbeer.com/, http://www.ajstephans.com/, https://abita.com/brews/our_brews/abita-root-beer, http://www.barqs.com/, http://bedfordssodas.com/products.html]
  - Column: FacebookPage
    - Samples: [None, None, None, None, None]
  - Column: Twitter
    - Samples: [None, None, None, None, None]
  - Column: WholesaleCost
    - Samples: [0.42, 0.98, 1.13, 0.4, 1.1]
  - Column: CurrentRetailPrice
    - Samples: [1.0, 3.0, 3.0, 1.0, 3.0]
- Table: rootbeer
  - Column: RootBeerID
    - Samples: [100000, 100001, 100002, 100003, 100004]
  - Column: BrandID
    - Samples: [10001, 10001, 10001, 10001, 10001]
  - Column: ContainerType
    - Samples: [Bottle, Bottle, Can, Can, Can]
  - Column: LocationID
    - Samples: [1, 1, 2, 2, 1]
  - Column: PurchaseDate
    - Samples: [2015-07-03, 2016-05-09, 2015-05-24, 2015-08-15, 2015-03-10]
- Table: rootbeerreview
  - Column: CustomerID
    - Samples: [101811, 101811, 101811, 101811, 105549]
  - Column: BrandID
    - Samples: [10012, 10014, 10015, 10021, 10015]
  - Column: StarRating
    - Samples: [5, 1, 3, 2, 2]
  - Column: ReviewDate
    - Samples: [2013-07-15, 2013-07-08, 2013-07-25, 2013-11-15, 2013-08-11]
  - Column: Review
    - Samples: [None, None, None, None, None]
- Table: transaction
  - Column: TransactionID
    - Samples: [100000, 100001, 100002, 100003, 100004]
  - Column: CreditCardNumber
    - Samples: [6011583832864739, 6011583832864739, 6011583832864739, 6011583832864739, 4716634257568793]
  - Column: CustomerID
    - Samples: [864896, 864896, 864896, 864896, 610766]
  - Column: TransactionDate
    - Samples: [2014-07-07, 2014-07-07, 2014-07-07, 2014-07-07, 2014-07-13]
  - Column: CreditCardType
    - Samples: [Discover, Discover, Discover, Discover, Visa]
  - Column: LocationID
    - Samples: [2, 2, 2, 2, 1]
  - Column: RootBeerID
    - Samples: [105661, 105798, 102514, 105623, 103940]
  - Column: PurchasePrice
    - Samples: [3.0, 3.0, 3.0, 3.0, 3.0]

SELECT T3.BrandName, T2.CustomerID FROM rootbeer AS T1 INNER JOIN `transaction` AS T2 ON T1.RootBeerID = T2.RootBeerID INNER JOIN rootbeerbrand AS T3 ON T1.BrandID = T3.BrandID GROUP BY T3.BrandID ORDER BY T3.CurrentRetailPrice - T3.WholesaleCost, COUNT(T1.BrandID) DESC LIMIT 1