Complex sentence: In 1976, Bi-Mart was bought by Pay' n Save which itself was acquired by Thrifty Corporation in 1984, subsequently merged into the former Kmart subsidiary PayLess Drug, and finally purchased by Rite Aid in 1996.
Split into simpler sentences: In 1976, Bi-Mart was bought by Pay' n Save which itself was acquired by Thrifty Corporation in 1984. It was subsequently merged into the former Kmart subsidiary PayLess Drug, and finally purchased by Rite Aid in 1996.