In the assembly department, all the direct materials are added at the beginning of the processing. Beginning Work in Process inventory consists of 2,000 units with a direct materials cost of $31,860. During the period, 15,000 units are started and direct materials costing $250,000 are charged to the department. If there are 1,000 units in ending inventory, what is the cost per equivalent unit?

$15.93

$15.63

$14.83

$16.58