Eban Corporation uses the FIFO method in its process costing system. The first processing department, the Welding Department, started the month with $19,800$ units in its beginning work in process inventory that were $50\%$ complete with respect to conversion costs. The conversion cost in this beginning work in process inventory was $$58,200.$ An additional $61,000$ units were started into production during the month. There were $17,200$ units in the ending work in process inventory of the Welding Department that were $20\%$ complete with respect to conversion costs. A total of $$296,160$ in conversion costs were incurred in the department during the month.

The cost per equivalent unit for conversion costs is closest to:

Multiple Choice

$$5\mathrm{.}18$

$$4\mathrm{.}55$

$$5\mathrm{.}74$

$$5\mathrm{.}11$