Step away from the keyboard! You are trying to "commit spreadsheet". Your
table has serious normalization problems and just will NOT work correctly in
a relational database.
OK. OK. I'm being overly harsh but not by much. What happens when someone
says that you need an 8th operator? You'll have to redesign not only your
table, but also any queries, reports, and forms based on that table. All the
Operators should be in one field down and not across as in a spreadsheet.
I highly suggest getting some relational database training or reading
"Database Design for Mere Mortals" by Hernandez before proceeding any further
on this database.
Here's a couple of on-line resources.
http://support.microsoft.com/kb/100139/en-us
http://support.microsoft.com/kb/234208/