List Box Fields Into 2 Fields In A Table

I have come up with another one that may be easy for you.

I have a form that has a list box with two fields in the table.
Call the table: STATE TABLE1
Call the first field: STATE NUMBER 1
Call the next field: STATE NAME 1

When I access the list box on the form, I have it so I can see the States Name(STATE NAME1) and I click on it and the (STATE NUMBER 1) is place in another table called: INVENTORY2 in the STATE#2 field. That works all well and good.

I would like to be able to continue this, at the same time I select the (STATE NAME 1) on the list box. I also want to place (STATE NAME 1) into the INVENTORY2 TABLE in another field call (STATE NAME2)

I was going to write an expression to do this but had trouble with finding the STATE NAME 1 field.

I am sure there is an easier way.

PS This table is being used in another application and there is no way to modify any of its field at the time of the transfer. All the fields need to be populated at the time of the transfer.

Thanks for your help.