Robert and Roberta Bowser, a married couple, received the following during the year 2020: Interest earned on a State of Tennessee bond $1,500; Interest on a State of Tennessee income tax refund $200; Interest on U.S. Treasury bills $2,000; Crockpot for opening a savings account $ 50 What amount of interest income should Mr. and Mrs. Maynard report on their current-year joint tax return? $3,750 $3,700 $1,750 $2,250