Given the Following Events, What Is the Per-Unit Value of Ending

Multiple Choice

Given the following events, what is the per-unit value of ending inventory on November 30 if this company uses a weighted average perpetual inventory system? November 1: 5 units were purchased at $6 per unit.
November 12: 10 units were purchased at $7.50 per unit.
November 14: 7 units were sold for $14 per unit.
November 24: 12 units were purchased at $10 per unit.

A) $6.00
B) $7.00
C) $8.80
D) $13.00
E) $21.80