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## Calculate difference between invoice amount not based on date

I'm looking for a way to calculate the difference between invoice amount, but not based on dates (month), but based on order of the invoice. So the difference between each invoice per client based on the fact that the invoice number increases each time.

the sample data looks like this: 1 ACCEPTED SOLUTION  Super User

pls try this

``````Column =
VAR _l=maxx(FILTER('Table (2)','Table (2)'[client]=EARLIER('Table (2)'[client])&&'Table (2)'[invoice]<EARLIER('Table (2)'[invoice])),'Table (2)'[invoice])
return if(ISBLANK(_l),BLANK(),'Table (2)'[amount]-maxx(FILTER('Table (2)','Table (2)'[client]=EARLIER('Table (2)'[client])&&'Table (2)'[invoice]=_l),'Table (2)'[amount]))`````` Proud to be a Super User!

7 REPLIES 7  Super User

could you pls provide the expected output?

Proud to be a Super User!  Helper II

hi @ryan_mayu ,

it comes down to this:   Super User

pls try this

``````Column =
VAR _l=maxx(FILTER('Table (2)','Table (2)'[client]=EARLIER('Table (2)'[client])&&'Table (2)'[invoice]<EARLIER('Table (2)'[invoice])),'Table (2)'[invoice])
return if(ISBLANK(_l),BLANK(),'Table (2)'[amount]-maxx(FILTER('Table (2)','Table (2)'[client]=EARLIER('Table (2)'[client])&&'Table (2)'[invoice]=_l),'Table (2)'[amount]))`````` Proud to be a Super User!  Helper II

@ryan_mayu

Thank you!
Almost works 100%. Only the last month of each years sums all the rows as you can see in the picture. Is there a way to fix this?   Super User

yes , because you have more than one value for that month, what's the expected otuput?

Proud to be a Super User!  Helper II

aaah sorry... its because i use the month and year in the X-axis so the values get summed in the vissual. thanks 🙂  Super User

you are welcome

Proud to be a Super User!  