Reporting Services Horizintal calendar with monthly and weekly sum

I want to create a report that represents a horizonal calendar by the specified month. Data cells of matrix contains the work hours of the employees.

The problems just follow:

• need to sum the monthly hours of the employee at the beginning of the line
• also need to sum the week hours of the hours and insert a column after Sunday weekday with sum hours

Thanks in advance!

UPDATE!

The answer below solve my main problem, the only problem is that, in the first data row is empty in all case. I think the empty row is displayed because not all days contain working hours and SSRS cannot group empty days, but i do not know what expression is the solution.

Assuming you have some sort of week number to group by...

Add a Row group by Employee, ....looks like this is already done.

For column groups, start with a group by date, then add a parent group with a header (right click your date group Add Parent, in the dialogue select your week number as the field to group on and select the include header option). Then add a total total group to the week number group to get your overall totals.

If you need a more detailed answer let me know and provide some sample data to work with.