Tableau grouping on a calculated field -

i wanted how many mkt 6/5/.... repeated. i.e count of mkts group cntd(no.week sale) column .

is there way achieve this.

tia

create calculated field cf1

{fixed [prod], [mkt] : countd([no.week sale])}

then put [prod] , [cf1] on columns shelf, countd([mkt]) on label (text) mark