Noob, script formatting query

Shell Programming and Scripting
1

Hi all, im new to the forums and i hope im not asking a heavily posted Q but here goes.
I use the following script to do a simple calculation, the problem is, the data i receive is in the form of numbers with commas i.e.
1,000,000
This code below wont recognise the commas so i have to remove them. If anyone has a simple solution or even point me in the right direction that would be grand. It's a little hard to search for an error with such a common word like "comma".

#! /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;

Thanks if anyone can help.

2

excuse me if am wrong

do you want to strip commas from the input ?

echo 1,000,000 | sed 's/,//g'
3

Yes, that's all i was after. Thank you for that.
As you can see im not the very good at scripting yet, this is probably a better job for something like perl. In any case, thanks for your help.