Using Breaks/Context operators in WebI

Hi guys,
Had an urgent question that i needed help with.
Right now in WebI i have a table with a column giving end times
for Example:
End Time
5:02 AM
5:44 AM
6:05 AM
6:15 AM
6:45 AM
7:10 AM
7:22 AM
Instead of detailed times i need to replace this column with a counter for every hour... Basically
Hour               Count
5th Hour           2
6th Hour           3
7th Hour           2
How do i acheive this? Using breaks doesnt work right and the Context operator "In" isnt giving the right results. Do i need a variable?

Need some more help :/
Right now I am using
=Left(FormatDate([SAHH Start Time];"hhMMSS");2)
to get a column that says:
Hour
01
02
03
04
05
I wanted to display it as 1:00, 2:00, 3:00 .... Also add the AM/PM to it if possible. Any idea how this can be done?

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Using Breaks/Context operators in WebI

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