§ 504. Sharing of distributions. Distributions of cash or other assets of a limited liability company shall be allocated among the members, and among classes of members, if any, in the manner provided in the operating agreement, which may, among other things, establish record dates for distributions. If the operating agreement does not so provide, distributions shall be allocated on the basis of the value, as stated in the records of the limited liability company, if so stated, of the contributions of each member, but not including defaulted obligations to make contributions, to the extent they have been received by or promised to the limited liability company and have not been returned to any such member.