The following represents a part of the the cost report for a manufacturing company:

$\backslash$table$[[$Cost category,Total Cost $($$$),$DM $($$$),$CC $($$$)],[$Cost of beginning WIP,$48,000,16,000,32,000],[$Current Costs,$346,000,126,000,220,000],[$Total Costs,$394,000,142,000,252,000],[$Number of equivalent Units,,$20,400,20,000],[$Cost $/$ Unit,$$6\mathrm{.}96,$$$12\mathrm{.}60,]]$

Based on the above, which method had the company used to determine the cost per unit?