Sum Totals for a Group Appearing on another board

Hi

I am looking to use the sum total from a group on a board (total sales for that group) as a column entry for a line item on another board. Is this possible please?

Thanks v much

I can mirror the column on the first board and get a sum of the totals, but I have to link every individual item in the group. Is there a way to link the group as a whole?