Monthly, Weekly and Daily Reports question

Hi,

1.

I am trying to create a 3 reports:

One that sums data of the last day,

One that sums data of the last week,

One that sums data of the last month.

What is the correct way to that? How do I boundry the range for each report without inserting teh specific dates?

2. How can I run nighly calculations on the database?

3. How do I insert a calender to my reports so user be able to select specific range of dates?

Thanks!