[OS] Copy-Pasting Files

#!/bin/bash
#check if the script is called with 2 arguments
if [ $# -ne 2 ]
then
    echo "USAGE: `hostname $0` ./source_folder ./destination_folder"
    exit 1
fi
#stick tha argument valuez
FROM=$1
TO=$2
#check if a destination folder exists and if not create it
#-p apparently means creating all the possible subfolders so its better if used
if [ ! -d $TO ]
then
    mkdir -p $TO
fi
#get the files that start with a number, have an x amount of lower case letterz and have an .out extension
files=`ls -l $FROM | awk '$1~/^-/ && $9~/^[0-9][a-z][a-z]*\.out$ {print $9}'`
for file in $files
do
    #copy-paste every file from 1 place 2 anotha
    cp ${FROM}${file} ${TO}${file}
done
#so in the next line we just calculate the summed suze of the pasted filez that we have execute permission on
total_size=`ls -l $TO | awk '$10~/^[0-9][a-z][a-z]*\.out$ {print $0}' | grep ^-..x | awk 'BEGIN {total=0;} {total+=$5} END {print total;}'`
#print on screen, 20 points in tha bag and cya lata aligata
echo "Vkupnata golemina na kopiranite datoteki koi korisnikot moze da gi izvrsuva e $file_size"