Tecumseh Company adds materials at the beginning of the process in Department K. The following information pertains to Department K's work-in-process during April: Units Work-in-process, April 1(60% complete as to conversion costs) Started in April Completed Work-in-process, April 30 (75% complete as to conversion costs) 6.000 50,000 40,000 16,000 Under the weighted average method, the equivalent units for conversion costs are Multiple Choice 50,000 48,400 O 40.000 O 43,600 52.000 Which cost estimation method is the least accurate or the most subjective? Multiple Choice engineering method O scatter graph method O O high-low method regression analysis account analysis