I used to take iron and I got the rite aid brand which is exactly the same as Feosol but way cheaper. I took 65mg of Iron from Ferrous Sulfate 220mg. Just a warning--it makes your poop dark black also, it can make you constipated although that didn't happen to me.
Actually, I just looked in my medicine cabinet because your post reminded me that I have a ton left since I stopped taking it. I have three unopened boxes of 100 tabs each--I'll send them to you if you end up wanting to take the same kind, just message me your address