cumulative total from the previous

[LucielBonella]

Dear, good afternoon

I need to apply a look where I put the cumulative total to today (10/15/2019) and target the cumulative total from the previous year to today (10/15/2018).

last scan =
CALCULATE (
MAX ('EXAMS - IMAGE' [GREATEST_DATE_TIME]); ALL ('EXAMES - IMAGE')))

var datalimit = EDATE (last scan; -12)

return

CALCULATE (
[_totalExams];
'EXAMS - IMAGE' [HIGH_REAL_DATE_TIME] <= date limit)