Bonanza '88' Stores were a discount chain that dominated much of the Western half of the US from 1967 to 1987.
They began as an all 88¢ store. Everything in the store, 88¢. Or 2 for 88¢ (many cheap budget label record albums were offloaded this way.) Over time, they began offering a mix of higher and lower price items.
In the late 1980s, Bonanza '88' was renamed simply Bonanza and also offered a pharmacy. They were bought out by the Seattle based Bartell chain in the late '80s.