CURRENT STOCK

[Admin11a1ab]

I’m working on an inventory app. I am using the formula below:
Sum(Select(Inventory[Amount], [ITEM ID]=[_THISROW].[Item ID]))
But the formula is summing the whole column [Amount] and not summing by [ID Item] on total stock available

[Tommy62]

SUM(
  SELECT(
    Inventory[Amount],
      ([Item ID] = [_THISROW].[ID])
  )
)

[Admin11a1ab]

the formula is summing the whole column [Amount] and not summing by [Item ID] on total stock available