Gerald received a one-third capital and profit (loss) interest in XYZ Limited Partnership (LP). In exchange for this interest, Gerald contributed a building with a FMV of $26,000. His adjusted basis in the building was $13,000. In addition, the building was encumbered with a $7,800 nonrecourse mortgage that XYZ, LP assumed at the time the property was contributed. What is Gerald's outside basis immediately after his contribution?

• $5,200.

• $7,800.

• $18,200.

• $20,800.