Sorry, I couldn't find pricing data for that day. The closing price for Coca-Cola (KO) on August 21, 2015 was $28.60. It was down 1.6% for the day. The latest price is $66.13.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
August 21 2015
$29.06
$29.28
$28.59
$28.60
28,036,200
Daily pricing data for Coca-Cola dates back to 1/2/1962, and may be incomplete.