Brianna, a nonresident of Arizona, received the following items of income this year: $40,000 in wages earned from work performed in Nevada. $400 in interest income from an account at an Arizona bank. $16,000 in rental income from a house located in Arizona. $12,000 in alimony paid by her ex-husband, Lucas, under a 2016 divorce agreement. Lucas is an Arizona resident. How much of this income is taxable on Brianna's Arizona return