David is paid on a graduated commission scale at nooter company. he receives 2% commission on the first $20,000, 6% on sales from $20,000 to $70,000, 8.5% commission on sales from $70,000 to $100,000, and 10% commission on sales over $100,000. david had sales of $82,000. his commission is:
rev: 08_24_2013_qc_ 34268
$8,200
$6,200
$4,240
$4,420
none of these