interest in a public traded partnership and investment expenses (Noncovered with undetermined holding period)

[keith79797]

I received a 1099-B for multiple stock transactions, and 3 were ones I can't identify how to handle

2 were very small transactions sold to pay investment expenses (total less than a dollar) and 1 was supposedly for sale of a Publicly Traded Partnership (related to a merger) showing about $20 in net proceeds. I ever got a 1-K related to the PTP transaction, and so am unsure how I would handle it,.  the transaction was related to a merger of two entities  As small as the amounts were, should I just leave the cost basis 0, and various for purchase dates