Duplicate data to another .xls file automatically

Hello,

I need to duplicate some information from an *.xls file to another *.xls file automatically, everytime user closes the Main file it should check and copy the new inserted data to another file.

I attached two files, Main.xls and Copy.xls

For example:

The information is inserted in Main.xls, now when smb closes the file it should check if A & B columns in the Copy.xls have the same data as in Y & Z column after that it should copy the data from AB & AC column of Main.xls to J & L colmun of Copy.xls file.

I hope I made myself understood, if not, I will do my best to rephrase, but better take a look at the files.

Thank you in advance.