Figure 6-15 the Davidson Company Uses a Weighted Average Process

Figure 6-15 The Davidson Company uses a weighted average process costing system. The following information was reported for the Assembly Process for January. Materials are added at the beginning of the process and are 100%.
Refer to Figure 6-15. What is the cost per unit for materials?

A) $4.00
B) $3.90
C) $4.96
D) $2.75
E) none of the above