During the current year, Stone received the following interest payments. How much interest must Stone include in her gross income? Interest of $400 on the refund of her state income tax; Interest of $300 from investments in US Treasury Bills (T-Bills); Interest of $1,500 on City of Atlanta municipal bonds; Interest of $1,000 on several certificates of deposits from the bank. 1) $1,300 2) $1,400 3) $1,700 4) $3,200