What chain of discount stores last operated in 1990 and used Mammoth Mart for their prototype?
Zayre Zayre was a chain of discount stores that operated in the eastern half of the United States from 1956 to 1990. The company's headquarters was in Framingham, Massachusetts. In October 1988, Zayre's parent company, Zayre Corp., sold the stores to the competing Ames Department Stores, Inc. chain, and in June 1989, Zayre Corp. merged with one of its subsidiaries, The TJX Companies, parent company of T.J. Maxx. A number of stores retained the Zayre name until 1990, by which time all stores were either closed or converted into Ames stores. (The TJX Companies, which also owns Marshalls, HomeGoods, and Sierra Trading Post, is still in operation as of 2017.)
Dayton's Dayton's was an American department store chain founded in Minneapolis, Minnesota in 1902 by George Draper Dayton. In 1969, the Detroit-based J.L. Hudson Company merged with the Dayton Company to form the Dayton-Hudson Corporation, adding 21 Michigan-based stores to the total. In 1990, the department store division of Dayton–Hudson (now Target Corporation) acquired Chicago-based Marshall Field's. Both Dayton's and Hudson's retained their individual store names until 2001, when they were united under the Marshall Field's nameplate. Prior to changing its name to Marshall Field's, Dayton's stores numbered 19, serving communities throughout the upper Midwest.