Sorry, I couldn't find pricing data for that day. The closing price for Amazon (AMZN) on August 31, 2018 was $100.64. It was up 0.3% for the day. The latest price is $219.50.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
August 31 2018
$100.35
$101.12
$100.24
$100.64
84,087,559
Daily pricing data for Amazon dates back to 5/15/1997, and may be incomplete.