Sale of a Principal Residence.

Marc, age 45, sells his personal residence on May 15, 2020, for $180,000. He pays $8,000 in selling expenses and $900 in repair expenses to help sell the residence. He has lived in the residence since 1994 when he purchased it for $55,000. In 2001, he paid $6,000 to install central air conditioning. If Marc purchases a new principal residence in December of the current year for $162,000,

what are the realized gain, recognized gain, and the basis for the new residence?