We have written a script where we are adding some items in the invoice if custom function is initiated. Fo example:

Items Qty

A      3

B      2

Will look like

Items Qty(Desired Format)

A      3      

X      3

Y      3

B      2

X      2

Y      2

But while running the script the invoice is uptated as:

items      Qty(Actual Format)

A      3

B      2

X      3

Y      3

X      2

Y      2

How can i add the items in the invoice as the desired format. Attaching our script for your reference. Let us know if how can we proceed.