can't really say. you would have to take the original amount invested and go through every k-1 to determine amounts to add or subtract from your investment to arrive at your basis. a box like 9c does not affect basis while box 10 does. that's because in prior years the IRS allowed schedule L to be reported on a basis other than tax basis.
you see the problems are you say schedule L income is 41941 while box 10 is 43105 - on a tax basis schedule L they would be the same and you say withdrawals and distributions on schedule L is 76028 that amount on a tax basis schedule L should agree with box 19. it is possible that the return preparers made adjustments to schedule L so the $231 is your tax basis for which you got $0. however, without going through all the prior K-1's there is no way we can be certain that $231 is your tax basis.
