How to Add two multi list fileds

Hi Experts

Need help for the below problem which i am facing.

I have two multi list fields separted by semicolon.

Field1 = (1;2;3;4)

Field2 = (5;6;7;8)

I am creating a new Multi List field Field3 which will be the Sum (Field1 , Field2)

Means the Field3 = (6;8;10;12)should be output.

Please help me how to achieve this through formula language.

Thanks

Subject: Please don’t cross-post

You already asked this in the 6/7 forum:http://www-10.lotus.com/ldd/nd6forum.nsf/0/8e704b4a4eedbbfe85257ba3006cd533

Also, you should post what you already tried, and what the result was.