Createing Totalizer tags from Instantaneous flow points

I am a new PI administrator and need assistance in creating tags to calculate total flow in a 24 hour period using an instantaneous flow meter and calculations.  Once these tags are created, I would also like to set up a report using the calculated information on a daily basis at the same time each day.  I did not find any videos on the You Tube channel that addressed this.  Does anyone have an example or procedure to create these tags?

Thanks.