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. And transferred them to the Finishing Department. The firm ended the month with 5,000 boxes in ending inventory 40% complete. 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 units to account for is .a boxes 85,000 .b boxes 95,000 boxes 90,000 .d boxes 89,000