The wooden box wil move towards Gina.
In fact, Newton's second law states that the resultant of the forces acting on an object is equal to the object's mass times its acceleration:
[tex]\sum F = ma[/tex]
In this case, the net force acting on the wooden box is different from zero: Jose is pushing with 20 pounds of force towards Gina, and Gina is pushing with 15 pounds of force towards Jose, so there will be a net force of 5 pounds towards Gina, and this will cause the box to accelerate.
