Shell Programming and Scripting

#! /bin/bash

        echo "What is the Lowest Threshold?" ;
        read LOW ;
        echo "What is the highest Threshold?";
        read HIGH ;
        echo "How much data have you received?";
        read DATA ;
        THRESHOLD=`expr $HIGH - $LOW` ;

                if [ "$DATA" -gt "$HIGH" ] ; then
                DIFF=`expr $DATA - $HIGH` ;
                DATA=`echo "scale=2; ( $DIFF / $THRESHOLD ) * 100" | bc` ;
                echo "$DATA percent above the threshold.";
                echo "Press 'enter' to continue" ;
                read cont ;
                elif [ "$DATA" -lt "$LOW" ] ; then
                DIFF=`expr $LOW - $DATA` ;
                DATA=`echo "scale=2; ( $DIFF / $THRESHOLD ) * 100" | bc` ;
                echo "$DATA percent below the threshold.";
                echo "Press 'enter' to continue" ;
                read cont ;
                else
                echo "This data is within the threshold limits.";
                echo "Press 'enter' to continue";
                read cont ;
                fi;

echo 1,000,000 | sed 's/,//g'