Question 4 a. Materials Equivalent units needed to complete beginning WIP inventory: Materials: 800 x (100% - 90%) Conversion: 800 x (100% - 10%) Units started and completed during period: 23400 - 800 Equivalent units in ending WIP inventory: Materials: 700 x 70% Conversion: 700 x 70% Equivalent units of production Conversion 80 720 22,600 22,600 490 23,170 490 23,810 Materials 71,221 1,814 73,035 23,170 $3.15 Conversion 542,848 1,406 544,254 23,810 $22.86 b. Costs added during period (a) Costs in the beginning of the inventory (b) Total costs (a+b) Equivalent units of production (c) Cost per equivalent unit (a+b)/c c. Equivalent units Cost per equivalent unit Cost in ending WIP inventory Materials 490 3.15 $1,544 Conversion 490 22.86 $11,201 Total Materials 1,814 3.15 Conversion 1,406 22.86 Total 3,220 80 720 3.15 $252 22.86 $16,459 $12,745 d. Costs in beginning WIP inventory Costs to complete units in beginning WIP: Equivalent units required to complete the beginning WIP inventory Costs per equivalent unit Costs to complete the units in beginning WIP inventory $16,711