Cherrington Company Uses a Process Costing System - Assuming That Cherrington Company Uses the FIFO Method,what Is

Cherrington Company uses a process costing system. For May, the month just completed, the beginning work-in-process inventory consisted of 50,000 units that were 60% complete with respect to conversion costs. The ending inventory for the month was 20% complete with respect to conversion costs. A summary of cost data for the month follows:
$\begin{array} {| l | r | r | } \hline & \text { Units } & \text { Conversion costs } \\\hline \begin{array} { l } \text { Work in process inventory } \\\text { on May 1 }\end{array} & 50,000 & \$ 30,000 \\\hline \begin{array} { l } \text { Units started into } \\\text { production }\end{array} & 180,000 & \\\hline \begin{array} { l } \text { Conversion costs incurred } \\\text { during May }\end{array} & & \$ 690,000 \\\hline \begin{array} { l } \text { Units completed and } \\\text { transferred out during the } \\\text { month }\end{array} & 190,000 & \\\hline\end{array}$

- Assuming that Cherrington Company uses the FIFO method,what is the cost per equivalent unit for conversion costs for May,rounded to the nearest cent?

A) $4.31.
B) $3.49.
C) $4.29.
D) $4.11.