=AND(ISNUMBER(A1),A1

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=AND(ISNUMBER(A1),A1=AND(ISNUMBER(A1),A1=AND(ISNUMBER(A1),A1=AND(ISNUMBER(A8),A8

=AND(ISNUMBER(A1),A1
=AND(ISNUMBER(A1),A1

=AND(ISNUMBER(A1),A1
=AND(ISNUMBER(A8),A8