Here's a refinement for the formulas in cols B & C
(a much shorter version using SUMPRODUCT):

Put instead in B1:
=IF(AND($A10,$A1<7),OFFSET(A!$A$1,SUMPRODUCT(--($A$1:$A1={1,2,3,4,5,6}))-1,COLUMN(A1)-1),OFFSET(B!$A$1,SUMPRODUCT(--($A$1:$A1={0,7,8,9,10}))-1,COLUMN(A1)-1))

Copy B1 to C1. Then select A1:C1, copy down as far as required (copy down by
the total number of rows from "A" and "B"). Hide away col A. Cols B and C
will return the merged data rows from sheets: "A" & "B" intermingled in the
desired ratio of 6:5.
--
Max
Singapore
http://savefile.com/projects/236895
xdemechanik
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