I work with the job of entering datas in preset formats of several
compaines. I have a table with number of rows and columns in a file of
MS-excel. I have made this as a PARENT and copied several such files
for data entry. Now, after I have completed most of the job, I found
that I forgot to add the sum column in the parent Excel file. Now, I
want to add a column to the parent file such that once I have added
(and/or removed ) the column, this change be made to all the files
that I have made a copy of.