Derek purchased concert tickets in the month of June for $73, $66, $96, $17, and $66 dollars. Which of the following is an accurate estimate of the total amount he spent on concert tickets in June?

The easiest way to make an estimate is to round each number so there is only one nonzero digit. Then you can easily add up the numbers:
$2069_w60_h13.png$
$8436_w60_h13.png$
$8593_w69_h13.png$
$5694_w59_h14.png$
$8436_w60_h13.png$
70+70+100+20+70=330