Delete top rows based on condition

[CGlace]

The following table shows the number of products produced by a manufacturing plant on a daily basis.

DATE	UNITS PRODUCED
01/01/2019	0
02/01/2019	0
03/01/2019	0
04/01/2019	0
05/01/2019	0
06/01/2019	5
07/01/2019	7
08/01/2019	4
09/01/2019	8
10/01/2019	0
11/01/2019	0
12/01/2019	5
13/01/2019	9

UNITS PRODUCED rows 1 -5 contain 0s. This is because plant operations don't commence until 06/01/2019.  0s that occur between 10/01/2019 and 11/01/2019 occurred during operational days but no units were produced.

I'd like to delete (or mark as 'null') Rows 1-5 from the table because I'm only concerned about production after the plant has commenced operations.  The condition I'm looking for would find the first row in UNITS PRODUCED with a value greater than '0' and delete (or mark as 'null) all rows prior to this row (i.e. rows 1-5 in the example table). 

Do I need to use the Multi-Row Formula tool? 

Any help please,

Paul

[OllieClarke · Accepted solution]

Hi @CGlace you can indeed do this with a multi-row formula tool. If you set it up like this, then you get what you want: