Ghon and Li own a home on Lake Gibran. During a heavy rainstorm, the lake overflows and floods the basement, which is used as their family room. The entire contents of the basement (rug, furniture, stereo, and so on) are destroyed. The insurance adjuster estimates that the damage to the basement and its contents is $13,500. Ghon and Li do not have flood insurance, so the insurance company will reimburse them only $2,700 for the damage. If their adjusted gross income for the year is $58,000, what is their deductible casualty loss?