Hey, everyone!

I'm wanting to sum how much "partial time" an employee worked during the week. What I mean by "partial time" is the time they didn't work during their 8 hour shift.

MON TUES WED THU FRI TOTAL HRS WORKED PARTIAL TIME
4 8 5 8 off 25 7

The expected result is 7 because 8-4=4 and 8-5=3.

Unfortunately, I haven't been able to find a formula where I get that result. Perhaps I'm looking at things the wrong way or I have an incorrect setup. Any help is appreciated.

Thank you all!