How to report APU MLP merger to UGI.

Hi, I bought units of the MLP APU over various time periods.  In 2019 APU merged with UGI which is not an MLP.  I recieved about .6 shares of UGI for every unit of APU.  My 1099 B gives information on this transaction not reported to the IRS.  My K-1 statement says this transaction was treated as a sale. I'm lost on how to report this information. "Under describe the Partnership" I selected "This partnership ended in 2019."  On the next page I select "Complete disposition".  Next "Sold Partnership interest".  Is this correct so far? On the next page it asks for a purchase date, should I put various? How do I derive the following as there appears to be no one to one match up in the forms I received:
 
Regular Gain or Loss:
Sale Price
Selling Expense
Parnership Basis
Ordinary Gain
1250 Gain
 
AMT Gain or Loss:
Partnership Basis
Ordinary Gain
1250 Gain