Herrerra Company had the following department information about physical units and percentage of completion: Physical Units Work in process, May 1 (40% complete) 36,000 Completed and transferred out 90,000 Work in process, May 31 (60% complete) 30,000 If materials and conversion costs are added evenly throughout the production process, what is the number of equivalent units for materials and conversion costs during May? a. 96,000 b. 120,000 c. 108,000 d. 126,000