Monthly golf tracker: Merge multiple worksheets to summay sheet

I am not sure if this problem can be solved with formulas & functions or if I need to post this problem in VBA.

This started out as a simple spreadsheet, but now my friend wants to be be able to graph stats using cumulative data. This workbook started out as a monthly golf tracker, but now I am trying to create a summary worksheet. I created worksheet "graph data" and I want to populate the respective columns with data from the monthly worksheets. The rounds played each month may be different, but it will be no more than 15. Score = v4:418, eagle = y4:y18, birdies= z4:z18 from the montly spreadsheats. I have not created all 12 months yet but I will add them as I build this spreadsheet. Is there a method to merge this data, or would I be better off starting over with a master sheet for data entry and pulling data from the master to each month.

Thanks for any advice or assistance.

Adam

Thanks for the quick answers but they are not exactly what I was looking for. =Sum will not work because I want the "graph" worksheet to copy all the individual rounds from each month, and the respective stats for that round. I should end up copying 8-10 rows from each each monthly worksheet. I will use the "graph" data to generate a line graph showing score, eagles, birdies, pars, bogeys, double, for each round. This way he can see the trends over time.

The other spreadsheet may work for another anohter project I have for our golf trips.

I copied the data from March2013 and April2013 to Graph Data as I would like it to appear. The Graph Data should get longer as more rounds are inputed each month.