TOTALHOURS () from beginning of current week and beginning of current month till now

[RECMAN_Systems]

Hi There,

Working with dates and specially time is rather confusing for me, therefore I really need to ask for help please.

I can not find the way to calculate the numeric value using TOTALHOURS() to get hours from beginning of current week till now in one formula and to get a numeric value of hours from beginning of current month till now.

Appreciate any help please.
Thanks in advance, Lovro