In 2017, Karen purchased a house for $150,000 to use as her personal residence. She paid $30,000 and borrowed $120,000 from the local savings and loan company. In 2020, she paid $20,000 to add a room to the house. In 2022 she paid $2,400 to have the house painted and $1,200 for built-in bookshelves. As of January 1 of the current year, she has reduced the $120,000 mortgage to $108,300. What is her basis for the house?