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

To estimate the total amount Derek spent on concert tickets in June, we can round each price to the nearest ten dollars.

$73 rounds to $70
$66 rounds to $70
$96 rounds to $100
$17 rounds to $20
$66 rounds to $70

Adding the rounded prices, we get $70 + $70 + $100 + $20 + $70 = $330.
Therefore, an accurate estimate of the total amount Derek spent on concert tickets in June is $330.