Weekly total for SSRS report

Hi

Could you please suggest how can I display weekly wise total in SSRS reports.

Actually I had a report where I need to select fromdate and todate let's say for example from date as 1/1/2018 and todate as 1/29/2018 so the report will show all the records from 1/1/2018 to 1/29/2018, here I need to sum totals weekly wise like 1/1/2018 to 1/7/2018 then total and again from 1/8/2018 to 1/15/2018 then total and soon..

Thanks in advance