Backup size for particular days

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for SID in `ps -ef | grep pmon | grep -Ev "grep|ASM" | awk '{print $NF}' | cut -f3 -d"_"`
do
SID=${SID%[12]}
cd /s<your backup area>/${SID}/rman
echo -e "\nEnter the dates below: e.g 23 24 25 26"
read ANS
echo -e "\nEnter the Month below: e.g Nov Dec"
read ANX
for z in ${ANS}
do
if [ ${#z} = 1 ]
then
z=" ${z}"
fi
> /tmp/sed.out
X=0
for i in `ls -al | grep "${ANX} ${z}" | awk '{print $NF}'`
do
A=`du -ak ${i} | awk '{print $1}' `
for x in ${A}
do
X=`echo "scale=2;"${x}+${X} | bc -l`
done
done
Y=`echo "scale=2;"${X}/1024 | bc -l`
echo "Total for ${ANX} ${z}= : "${Y}"M"
done