I import a text file into Excel. I need to add one column of data that
contains minutes and seconds. I can use the SUM function to add a range
okay, however, when the total is more than one hour it fails to show me the
hour column and displays a small value in minutes only. I need to be able to
add the minutes and seconds and come up with a total showing the total hours
minutes and seconds for a range in this column. I listed the exact format
that I import into Excel below. Thank you in advance.

0:15
3:00
0:30
0:15