A company sells three different mixes of birdseed to help attract various birds to a bird feeder. The first mix contains 4 lbs. of sunflower seeds, 1 lb. of safflower seeds, and 10 lbs. of millet per bag. The second mix contains 4 lbs. of sunflower seeds, 3lbs. of safflower seeds, and 8 lbs. of millet per bag. The third mix contains 2 lbs. of sunflower seeds, 1 lb. of safflower seeds, and 7 lbs. of millet per bag. If the company currently has 40 lbs. of sunflower seeds, 21 lbs. of safflower seeds, and 104 lbs. of millet in stock, how many bags of each mix can they make?

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