Dear Ron Lence,
please post a full task as a new question.
Vehicle B was moving perpendicular at 15-20 mph at the point of the collision. Vehicle B was struck virtually square in the right side center post by vehicle A.
To solve this problem we need to know velocity of vehicle (B) or its deceleration right after collision.
Lack of details is not an answer. What details do you require to provide an answer to my question?