Wife Retiring from QJV, how do I acquire her inventory assets

My wife and I have been operating our business for years as a Qualified Joint Venture.  We each file our own Schedule C on our jointly filed taxes each year.  She retired as of September 1 and will not be working in our business anymore.  We are inventory based, so she has been doing a COGS calculation as part of the inventory is hers.  Now, 100% of the inventory will be mine.  How do I show this on paper as my inventory number is going to change abruptly.  Do I buy her inventory for her % of value and then she would have zero inventory on her final filing for the business?  And that would raise my inventory to the correct value for 100% and her value to zero? Thanks in advance.