Another question for a quicker way to perform a running total

I need to create a spill formula for a running total

I’m able to create this formula using

=SUMIF($B$2:$D$2,"<="&COLUMN($B$2:$D$2)-1,B3:D3)

But I’m not able to understand how to make it work as one formula only so that I don’t have to drag for each row hoping someone can assist

>Solution :

We can use OFFSET and SUMIF:

=SUMIF(OFFSET(B3,SEQUENCE(ROWS(B3:D8),,0),0,1,SEQUENCE(,COLUMNS(B3:D8))),"<>")