Find the sum last 3 values in column

[bailo]

Hello,

I want to find sum of the 3 last values of my column "quantityItem" using 3 last dates.

on the example below : 

my 3 last dates are 25/02/2020; 28/01/2020; 31/12/2020

i want the sum "1 +1 +1" = 3

Thank's for your help

[FrankAT · Accepted solution]

Hi @bailo 

take a look at the following solution (I used my own sample data):

Top3 = 
SUMX(
    TOPn(
        3,
        'Table',
        'Table'[CollectionDate_c],
        DESC
    ),
    'Table'[QuantityCollectedItem_c]
)

With kind regards from the town where the legend of the 'Pied Piper of Hamelin' is at home
FrankAT (Proud to be a Datanaut)

[bailo]

merci beaucoup

je ne saurais comment vous remercier.

Vous etes genial!!