Condense a column (by using formula)

[Little_Tiger]

I have 2 columns that is as follow:
A B C D
12 0 6
11 0 4
23 3 3
21 4 8
11 0
10 6
17 0
17 0
28 8
10 0

I would like to have in column C, the order from small to large (of column A) based on column B when there is a value greater than 0.
When there is a 0, the formula should ignore and move the the next row. I would like to the formula to condense column B and re-arrange the value in column B based on column A.

Column D shows what I would like to have be done automatically.

Any idea?

thanks, -=LT=-

 

[Little_Tiger]

@Rick Rothstein;

Would you mind helping me? I did fix one issue. When the first search was missing. Now the 2 last issue I can't solve.
I have made progress, I can now have a column with none of the '0'. However, I can't order them (because the value is the row number) to another column.

If you can and want, please me let me know

Thanks
-=LT=-