Facing problem while calculating Totals in ReSA

HI

I am facing problem in page #4  Realms of Total definition wizard in RMS 14.0 application.

I am trying to calculate number of item sold in some number of days,so I  need to import SA_TRAN_ITEM table for that but every time I am getting an error

i.e. "Store/Day information must be available "

But if I am importing SA_STORE_DAY table then "SA_TRAN_HEAD " and  "SA_TRAN_ITEM" table become disable to import.

So Is it mandatory to import "SA_STORE_DAY",if yes then how we can import other table which become disable.

Regards