What is opportunity cost? the value of the third-best alternative that a person gives up when making a choice
the value of the immediate best alternative that a person gives up when making a choice
the value of the second-best alternative that a person gives up when making a choice
the value of the last best alternative that a person gives up when making a choice
the value of the second-worst alternative that a person gives up when making a choice

Juan's investment portfolio was valued at $125,640 at the beginning of the year. during the year, juan received $603 in interest income and $298 in dividend income. juan also sold shares of stock and realized $1,459 in capital gains. juan's portfolio is valued at $142,608 at the end of the year. all income and realized gains were reinvested. no funds were contributed or withdrawn during the year. what is the amount of income juan must declare this year for income tax purposes?