Round up a total to the next quarter hour

I currently have a total number of hours worked that I want to round to the next quarter hour. I don't want it to round back to the last quarter hour but forward. For example, even if I have a total time of 10.01 hours I would like it to round to 10.25 hours. I currently have this formula loaded in the total cell: =ROUNDUP(SUM(D6:D21),1) I also want to show the total number of hours and minutes in my total cell and not the decimal. I have attached a copy of the spreadsheet I am working with. Can anyone help me! Thanks,

That was helpful, Thank You. Right now when I have 2:00 pm to 3.58 pm it shows 1.97 hours. How can I get it to show the actual hours and minutes, total the column up and have it round to the next quarter hour?

That did the trick. Thank you for your help. It is very much appreciated.