Bottom 5 quantity based on Item and Customer

I have two columns with names item and customer and one measure(for quantity).

I want to find the bottom 5 items by quantity but it is not showing bottom 5 when I filter out the item by Bottom N,

the reason is there are two items with same name. I have tried but the rank but this is not gona work for me bcs I will use it in matrix later on.

Can anyone help me with dax to get the bottom 5 quantity by item.

The actual result should look like this

Thanks