Darya is a real estate broker with a house listing. She estimates that this listing will cost her $2500 for various expenses. If Darya sells the house within 6 months, she will receive a commission of $23,000. If it takes longer than 6 months, the listing will expire, and she'll lose the $2500 she spent on expenses. She estimates the probability that she'll sell the house within 6 months is 85%. Determine Darya's expectation for this listing. Darya's expectation for this listing is $|:|. (Type a whole number.)