At a county fair truck pull, two pickup trucks are attached to the back end of a monster truck. One of the pickups pulls with a force of 2000 pounds and the other pulls with a force of 3000 pounds with an angle of 60° between them. With how much force must the monster truck pull in order to remain unmoved? (Hint: Find the resultant force of the two trucks.)
(Round to the nearest hundred pounds as needed.)