need help with sum and time

hi. i am setting up what time I am working in the week and want to sum it up to see how many hours that is a week, but i have never used excel before at least not like this. Any tips on how i am doing that?

Have the days going down in A2, A3, etc, lik Mon, Tue

In B2, enter the start time for Monday in the format 08:15 (excel will know that is time).

In C2, enter the end time in the same format.

In D2, enter the formula, =C2-B2 and format (Format>Cells>Custom) as hh:mm.

This will give your weeks times, then in cell C7 enter the formula =SUM(C2:C6), and format that as [h]:mm his is to cater for moree than 24 hours worked.