Complex sentence: Bowmar Instrument Corporation introduced the "Bowmar Brain", a four-function pocket calculator, in September 1971 and the $179 calculator sold over 500,000 copies in the first year.
Split into simpler sentences: Bowmar Instrument Corporation introduced the "Bowmar Brain", a four-function pocket calculator, in September 1971. The $179 calculator sold over 500,000 copies in the first year.