Inacio Corporation uses the weighted-average method in its process costing system. Data concerning the first processing department for the most recent month are listed below:

Beginning work in process inventory:
Units in beginning work in process inventory		2,400
Materials costs	$	14,500
Conversion costs	$	6,600
Percent complete with respect to materials		75	%
Percent complete with respect to conversion		20	%
Units started into production during the month		11,100
Units transferred to the next department during the month		10,000
Materials costs added during the month	$	173,600
Conversion costs added during the month	$	243,600
Ending work in process inventory:
Units in ending work in process inventory		3,500
Percent complete with respect to materials		90	%
Percent complete with respect to conversion		30	%

The cost per equivalent unit for materials for the month in the first processing department is closest to: