Answer:
d. 90,000.
Explanation:
Weighted average processing cost:
completed during the period 80,000
complete portion of ending WIP
30,000 x 1/3 = 10,000
Total EU 90,000
FIFO processing cost:
80,000 completed
+ 10,000 ending WIP
- 20,000 x 1/5 previous production
86,000
as only W/A equivalent untis is possible to pick that should be the answer.