Summarizing Times For Specific Items Within Specific Time-frame

I got Excel for Mac 2011 installed. I have a table called 'Raw" that holds data from the beginning until the end of 2013 (in total ~7000 rows). I have columns for Category, Start and End time, and time period in Hours, Minutes, and Seconds:

Code:
A
B
C
D
E
F

Category
Start
End
Hours
Minutes
Seconds

Transportation
2013/01/01 01:00:00
2013/01/01 01:15:00
0:15:00
15:00
900

[Code] ...........

I'm trying to get an overview of how much time I've spent in January on Transportation. I would need to look at the Category entries for Transportation, then only use the ones which have the Start set to 2013/01, and then take the Hours/Minutes/Seconds, and summarise it in a new table called 'Data':

Code:
A
B
C
D
E
F

Month
Category
Occurrence
Hours
Minutes
Seconds

2013/01
Transportation
48

[Code] .......

I have figured out a way to count the occurrences for Transportation for January:

=COUNTIFS(Raw!B:B,">="&"2013/01/01 00:00:00"+0,Raw!B:B,"