Try not to put a dollar figure on what you think should be donated back into fisheries. Use a % instead. After all the grunt work, you want to make as much profit as you can. Thats just business. Giving away 20% of something that you might only see 10% profit from makes no sense. If you use a 10% profit margin as the norm, and you arent to concerned about how much money you make off of them, I think a donation of 5% would me more along the lines of what you should be looking at. If you produce 25000 of them, sell them for $10, thats $250,000. 5% of $250,000 is $12,500. Thats a bunch of money back into the fisheries program of your choice with you still making a bit of profit as well.
Great design by the way. Im not from the coast but for as many times as i get out there a year, id buy a couple as well.
Ps, where can I get some sitka stickers?