This question is an exact duplicate of:
I'm creating a t-shirt design and need to know how to combine all the white shapes that make this image and separate it from any dark green. The white image will eventually be printed on a dark green t-shirt as shown in the template. If you open the file you can see that the image was created with a combination of white and dark green shapes. I would like the white part that's visible to be the only image in this file.
Here's the link to the illustrator file: http://www.lendtmusik.com/NWBandAlumniT-Shirtversion2.ai