On March 1, Portland Company had 20,000 units of v ork in process in Department A, which were 100% complete as to material costs and 40% complete as to conversion costs. During March, 150,000 units were started in Department A and 160,000 units were completed and transferred to Department B. Work in process on March 31 was 10 0% complete as to material costs and 50% complete as to conversion costs. By what amount would the equivalent units for conversion costs for the month of March weighted-average method? differ if the FIFO method were used instead of the O 10,000 decrease. O 8000 decrease. O 6,000 decrease O 5,000 decrease. O 4000 decrease