Sabra has a garden in the shape of triangle ABC shown below. She has mapped her garden onto a sheet of graph paper in order to expand her design. Side BC requires 3 feet of edging, AB 4 feet of edging, and AC 5 feet of edging. Sabra is thinking of placing 3 additional trianglular gardens at rotations of triangle ABC by 90, 180, and 270 degrees CCW about point B. If Sabra uses the edging already in place for any additional overlapping triangles that occur in the rotations, how many more units of fencing will Sabra need for the expansion to her garden? Explain or show your reasoning