In 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 ............................................................800

Materials costs ..........................................................................................................$ 12,900

Conversion costs ......................................................................................................$ 1,000

Percent complete with respect to materials ..................................................................75%

Percent complete with respect to conversion ................................................................10%

Units started into production during the month..........................................................9,500

Units transferred to the next department during the month......................................8,400

Materials costs added during the month ................................................................$ 172,000

Conversion costs added during the month...............................................................$240,200

Ending %slat in process inventory:

Units in ending work in process inventory......................................................................1,900

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:

(a) $17.01

(b) $17.95

(c) $16.70

(d) $18.29