Not sure if this is right, please answer and show all work. I thought the equation was (1900-210)*.03=1639. But im being told other wise and do not know how to get the number to multiply it by.

A company purchased $1,900 of merchandise on July 5 with terms 3/10, n/30. On July 7, it returned $210 worth of merchandise. On July 8, it paid the full amount due. The amount of the cash paid on July 8 equals Multiple Choice $1,690. $210, $1,639. $1,900 $1,633