A script to use https://gist.github.com/1200104 to query the All AWS usage reports programmatically.

aws_all_prev_usage.sh

#!/bin/sh

AWSUSAGE=aws_usage.py
TEMPFILE=/tmp/aws_all_prev_usage$$.xml
USERID=$1
PASSWORD=$2

if [ "" = "$USERID" ]
then
  exit
fi

if [ "" = "$PASSWORD" ]
then
  exit
fi

echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" > $TEMPFILE
echo "<ServiceUsage>" >> $TEMPFILE

for SERVICE in `$AWSUSAGE -l`
do
 $AWSUSAGE -s $SERVICE -f xml -U "$USERID" -P "$PASSWORD" -t aws-portal-prev-bill-period | grep -v "^<" >> $TEMPFILE
done

echo "</ServiceUsage>" >> $TEMPFILE

cat $TEMPFILE

rm $TEMPFILE