Zeta Co. reported sales revenue of $4,600,000 in its income statement for the year ended December 31, 2006. Additional information is as follows:

Zeta wrote off uncollectible accounts totalling $20,000 during 2006. Under the cash basis of accounting, Zeta would have reported 2006 sales of
$4,900,000
$4,350,000
$4,300,000
$4,280,000