Summing multiple cells in a row in an access table

[Rose]

I am no whiz with Access and I could use some help ...

I have created a database and a form for production down time. Most of the
columns are reasons for down time on a shift. Each of three shifts per day
will enter data, so there would be about 21 form entries per week. Is it
possible to total all minutes entered in the form per shift?

I hope I have not made this confusing. Any help would be greatly
appreciated!!!

Thanks!