How can Split group of row into some of subsets based on condition?

[osama_ayoub]

I have a Table as below 

this table has some items and quantity and price columns 

what I want to do is divide these items to groups where the total sum of  net price for each group does not exceed 2000$ ?

[wdx223_Daniel]

you can try this code, but the efficiency is a problem

NewStep=let a=Table.AddIndexColumn(PreviousStepName,"idx"),b=List.Buffer(a[Net Value]) in Table.Group(a,"idx",{"n",each _},0,(x,y)=>Byte.From(List.Sum(List.Range(b,x,y-x+1))>=2000))