attendances file. copy multiple cells from many sheets to one main sheet. NOOB :/

ok so I'll try to explain this as well as I can. I have an attendance file w/least 30 sheets. 29 of the sheets are for each separate group. The other sheet is the main one where I need to collect information like "total participants in attendance" and "total members in group" Then I divide those two and get the percentage of attendance.

The sheets containing the individual groups info are set up like this... (1=they were in attendance)

GROUP 1
Name / January / February / March/
Jess________1________0________1
Ryan_______1________1________0
Joe ________1________0________0
----------------------------------
total P ____3________1_________1
members___3________3_________3
% _______100_______33________33


The main sheet looks like this

Group / Jan. Participation / Jan. Member total/
Grp 1 ________3_____________3
Grp 2 ________8_____________10
Grp 3 ________7_____________10
---------------------------------------------
_____________18____________23
% total-__________________78.2%


MY QUESTION-
I know I can manually go through and link the sums of participation and total group size into the main sheet, but I have a lot of workgroups and need to do this every month, is there an easier way? I am willing to change the set up of the sheets.

THANKS!

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