amy filed 2018 form 1040, U.S. individual income tax return, on October 17,2019. on this form 1040, amy claimed a $15,000 refund. on december 15,2019, the IRS scheduled, and Department of treasury issued the refund to amy for $15,000 plus interest. Question: how many days of interest, if any, was Amy entitled to receive on the $15,000 refund check?