Chae Corporation uses the weighted-average method in its process costing system. This month, the beginning inventory in the first processing department consisted of 540 units. The costs and percentage completion of these units in beginning inventory were:

	Cost	Percent Complete
Materials costs	$6,300	80%
Conversion costs	$5,300	30%

A total of 8,500 units were started and 7,700 units were transferred to the second processing department during the month. The following costs were incurred in the first processing department during the month:

Materials costs	$136,300
Conversion costs	$322,300

The ending inventory was 70% complete with respect to materials and 65% complete with respect to conversion costs.

Note: Your answers may differ from those offered below due to rounding error. In all cases, select the answer that is the closest to the answer you computed. To reduce rounding error, carry out all computations to at least three decimal places.

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

$16.51

$15.78

$15.77

$15.08