Same period last month by working days

[answeriver]

Hi all,

How i can use formula which help me make sameperiod last month with same count of working days in two periods.

Now i use this, but it's error (red text)

SPLM = CALCULATE([mln st];REPORT_IMS[VISIT YEAR]=YEAR(TODAY());'REPORT_IMS'[VISIT MONTH]=MONTH(TODAY())-1;REPORT_IMS[WORKING DAY]<=CALCULATE(MAX(REPORT_IMS[WORKING DAY];DATESMTD(REPORT_IMS[VISIT DATE]))))

How i can fix it?

Basically i need sales (mln st) in previous month in same count of working days in this month

[answeriver]

also i didn't separately date table. I use all in my tabel with all data (sales, product, clients, dates, working day)