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:

800

Units in beginning work in process inventory

$12,900

Materials costs .

$5,000

Conversion costs

75%

Percentage complete with respect to materials

20%

Percentage complete with respect to conversion

9,500

Units started into production during the month

8,400

Units transferred to the next department during the month

$172,000

Materials costs added during the month .

$240,200

Ending work in process inventory:

 

Units in ending work in process inventory

1,900

Percentage complete with respect to materials

90%

Percentage 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