On December 1, 2026, Eagle, Inc. sold machinery to a customer for $21,000. The customer could not pay at the time of sale but agreed to pay six months later and signed a 6-month note at 9% interest. How much interest revenue was earned for the entire term of the note? Round any intermediate calculations to two decimal places, and final answer to the nearest dollar. OA. $790 OB. $1,890 OC. $945 D. $158