Joos 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:

600

Units in beginning work in process inventory

$7,300

Materials costs .

$2,300

Conversion costs

50%

Percentage complete with respect to materials

10%

Percentage complete with respect to conversion

9,400

Units started into production during the month

8,600

Units transferred to the next department during the month

$196,300

Materials costs added during the month .

$315,800

Ending work in process inventory:

 

Units in ending work in process inventory

1,400

Percentage complete with respect to materials

70%

Percentage complete with respect to conversion

40%

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

A) $19.63

B) $21.25

C) $20.36

D) $20.49