Eighty percent of the Willigs’ AGI comes from their submarine sandwich shop operated as a sole proprie-torship. In 2014, the Willigs lost an IRS audit and owed $ 12,000 in 2012 federal income taxes, all attributable to inventory computations in their business. Interest on this amount totaled $ 3,200. All amounts due were paid by the end of 2014. How much of the interest can the Willigs deduct on their 2014 Schedule C?