Sorry, I couldn't find pricing data for that day. The closing price for Microsoft (MSFT) on September 28, 2012 was $23.79. It was down 1.4% for the day. The latest price is $510.96.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
September 28 2012
$24.13
$24.19
$23.78
$23.79
54,229,300
Daily pricing data for Microsoft dates back to 3/13/1986, and may be incomplete.