Department M had 2,000 units 40% completed in process at the beginning of June, 12,000 units completed during June, and 1,200 units 25% completed at the end of June. What was the number of equivalent units of production for conversion costs for June if the first-in, first-out method is used to cost inventories?

a.15,200 units

b.10,000 units

c.11,200 units

d.11,500 units