Question: Seymour Horace Knox merged his more than 100 stores with the operator of variety stores known as what?

Context articles: Seymour H. Knox I
Gamble-Skogmo
Seymour H. Knox II
Go-Lo
Frank Winfield Woolworth
Seymour H. Knox III
Discount store
Metropolitan Stores
McColl's
Dollar Tree

Seymour Horace Knox I (April 1861 – May 17, 1915), was a Buffalo, New York businessman who made his fortune in five-and-dime stores.
 He merged his more than 100 stores with those of his first cousins, Frank Winfield Woolworth and Charles Woolworth, to form the F. W. Woolworth Company.
 He went on to hold prominent positions in the merged company as well as Marine Trust Co.
 He was the father of Seymour H. Knox II and grandfather of Seymour H. Knox III and Northrup Knox, the co-founders of the Buffalo Sabres in the National Hockey League.
Gamble-Skogmo Inc. was a conglomerate of retail chains and other businesses that was headquartered in St. Louis Park, Minnesota.
 Business operated or franchised by Gamble-Skogmo included Gambles hardware and auto supply stores, Woman's World and Mode O'Day clothing stores, J.M. McDonald department stores, Leath Furniture stores, Tempo and Buckeye Mart Discount Stores, Howard's Brandiscount Department Stores, Rasco Variety Stores, Sarco Outlet Stores, Toy World, Rasco-Tempo, Red Owl Grocery, Snyder Drug and the Aldens mail-order company.
 In Canada, retail operations consisted of Macleods Hardware, based in Winnipeg, MB, and Stedmans Department Stores, based in Toronto.
 Gamble-Skogmo carried a line of home appliances, including radios, televisions, refrigerators, and freezers, under the Coronado brand name.
Seymour Horace Knox II (September 1, 1898 – September 27, 1990) was a Buffalo, New York philanthropist and polo player.
 The son of wealthy businessman Seymour H. Knox, he owned a palatial home designed by C. P. H. Gilbert.
Go-Lo was a chain of Australian discount variety stores with hundreds of stores throughout Australia.
 It was part of the largest discount retailer group in Australia.
 It was owned by Jan Cameron's Retail Adventures along with Sam's Warehouse, Crazy Clark's and Chickenfeed stores.
 The company was sold by Miller's retail to Australian discount retail in 2005.
 The chain's parent company, Australian Discount Retail, went into receivership in January 2009 after owing $201 million to creditors.
 Recently the company and the other 3 chains of stores owned by Australian Discount Retail have been bought by Jan Cameron under the company name Retail Adventures.
Frank Winfield Woolworth (April 13, 1852 – April 8, 1919) also known as Frank W. Woolworth or F.W. Woolworth was an American entrepreneur and the founder of F. W. Woolworth Company and the operator of variety stores known as "Five-and-Dimes" (5- and 10-cent stores) or dimestores, which featured a low-priced selection of merchandise.
 He pioneered the now-common practices of buying merchandise directly from manufacturers and fixing the selling prices on items, rather than haggling.
 He was also the first to use self-service display cases, so customers could examine what they wanted to buy without the help of a sales clerk.
Seymour Horace Knox III (March 9, 1926 – May 22, 1996) was a philanthropist and sports entrepreneur.
 He owned the Buffalo Sabres of the National Hockey League from their foundation in 1970 to his death in 1996, and served as chairman of the team.
 He was the grandson of Seymour H. Knox I, the F.W. Woolworth Company co-founder, and son of art enthusiast Seymour H. Knox II.
A discount store is a retail store which sells products at prices that are lower than the typical market value.
 A "full-line discount store" or "mass merchandiser" may offer a wide assortment of goods with a focus on price rather than service, display, or wide choice - such as Aldi and Lidl; a "speciality", "single line", or "category killer" discount store may specialize in specific merchandise such as jewelry, electronic equipment, or electrical appliances, relying on bulk purchase and efficient distribution to keep down cost - such as Toys "R" Us and Staples.
 Discount stores are not variety stores, which sell goods at a single price-point or multiples thereof (£1, $2, etc.).
 Discount stores differ from variety stores in that they sell many name-brand products, and because of the wide price range of the items offered.
 Following World War II, a number of retail establishments in the U.S. began to pursue a high-volume, low-profit-margin strategy designed to attract price-conscious consumers.
 This strategy has received renewed interest from retailers and customers alike stemming from the Great Recession that began in 2007 that forced buyers to revisit the approach to the products they wanted.
Metropolitan Stores of Canada Ltd. (often referred to as The Met, Met Stores or Metropolitan) was a former Canadian chain of variety stores based in Winnipeg, Manitoba.
 The Metropolitan Stores chain was founded in 1920 and also operated junior department and clothing stores under the SAAN, Greenberg and Red Apple banners.
 At its peak, Metropolitan was one of the four largest variety chain store organizations in Canada with 180 stores in all the provinces and territories.
 In French, the chain was known as le Met and Metropolitaine.
McColls Retail Group is a British convenience store and newsagent operator, trading under the trading names McColls (for convenience stores), Martins (newsagents and variety stores) and RS McColl for stores in Scotland.
 McColls also operate post offices in one third of the estate, making them the largest post office operator in the United Kingdom.
Dollar Tree, Inc. is an American chain of discount variety stores that sells items for $1 or less.
 Headquartered in Chesapeake, Virginia, it is a Fortune 500 company and operates 13,600 stores throughout the 48 contiguous U.S. states and Canada.
 Its stores are supported by a nationwide logistics network of eleven distribution centers.
 The company operates one-dollar stores under the names of Dollar Tree and Dollar Bills.
 The company also operates a multi-price-point variety chain under Family Dollar.