Assuming your data in A1:J20:-
To Sum data, then in L1 put the following and copy to L1:U10
=SUM(OFFSET(A$1,(ROW()-1)*2,0,2))
To conctenate data, then in L1 put the following and copy to L1:U10
=OFFSET(A$1,(ROW()-1)*2,0)&" "&OFFSET(A$1,((ROW()-1)*2)+1,0)
When done just copy L1:U10, paste special as values and then delete A1:J20.
Regards
Ken.................
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