Complex sentence: The four stores in Whiteclay which now exclusively sell beer sell an average of 4.5 million cans of beer per year which equates to 12.5 thousand 12 oz. cans per day for gross sales of 3 million dollars annually.
Split into simpler sentences: The four stores in Whiteclay, which now exclusively sell beer, sell an average of 4.5 million cans of beer per year. This equates to 12.5 thousand 12 oz. cans per day, for gross sales of 3 million dollars annually.