90 days Utilization

Hi v-lili6-msft 

Thanks you so much for your greate help 
Please have a look attached data in which iave give Pine Code, Date, Cust #.
wish to be have weekly average cust# count, Monthly average Cust# count and its 90days pecentile (90 days) like you created but it should be measure if possible

Thanks in advance 

Revised Sample Data