Coca Cola manufacturers a standard juice. During February, the firm's Assembly Department started production of 75,000 boxes. During the month, the firm completed 85,000 boxes. Andtransferred them to the Finishing Department. The firm ended the month with 10,000 boxes in ending inventory. All direct materials costs are added at the beginning of the production cycle, Conversion costs are incurred uniformly over the production cycle. Weighted-average costing is used by Coca Cola. the equivalent units for materials for February is:

a. 75,000 boxes

b. 95,000 boxes

c. 80,000 boxes

d. 85,000 boxes