An excel formula to find a row/column index in array

Question

I have an excel table array, with row and columns indexes. Inside the array, there are some empyu cells and some cells with unique values.

Now i want to get a simplified

Answer 1

=B2&A2 should be sufficient, but you would have to 'reverse pivot' first and maybe delete blanks en route. In Excel 2007:

Add label in A1.
Alt+D, P.

Drill down on 7 (the intersect of the Grand Totals).
For Value filter for (Blanks) only and delete selected rows. Take off filter and add formula in D2. Sort and delete surplus, if desired.