DAX Help-Calculating Employee Working Hours

Hi All,

I'm new to DAX and am trying to calculate the alltime sum of hours an employee was working. I would then use that number and divide it by the amount of 'days worked' to get an average per day for an employee scorecard report.

My data is in a table called 'Workfile' that contains all the individual 'Picks' per employee along with the date and time. It looks something like this:

I was thinking to subtract the MIN 'Pick_Time' from MAX 'Pick_Time' to get the hours worked, but I have no idea how to do this over this table which contains thousands of rows with hundreds of rows per date per employee. I do have a date and time table in my dataset.

To summarize: How do I get a single number of the total hours worked by all employees out of a table that has thousands of rows per date with hundreds of different 'Pick_Time' values for each employee.

Any help would be appreciated and also if you can explain your thought process in approaching this question.

Thank you in advance!