Conversation so far:
What was Donnie Iris and the Cruisers biggest hit song?
My Girl was Donnie Iris and the Cruisers' biggest hit song
What year was the song My Girl by Donnie Iris and the Cruisers released?
My Girl by Donnie Iris and the Cruisers was released in 1981
What was Donnie Iris and the Cruisers' best selling album?
Despite Fortune 410 charting higher than The High and the Mighty, MCA was displeased that both albums didn't chart as high as Back on the Streets and King Cool had.
In what year was the album King Cool by Donnie Iris released?
King Cool, credited to Donnie Iris and the Cruisers, was released in August 1981

Question: How many King Cool albums were sold?
Self-contained rewrite: How many King Cool albums by Donnie Iris and the Cruisers were sold?