You go to the first post in this thread and read it.
"22 Fall Co-op open for sign-up
Find your name in group “A” $6 or group “B” $11 shipping
See the number behind you name and multiply it by $2.
Click on the 
link in the post.
Choose the right option for shipping. Add that to the cart and then make a donation of the result for you strain number by $2.
