Dapper Corporation had only one job in process on May 1. The job had been charged with $1,300 of direct materials, $3,680 of direct labor, and $5,940 of manufacturing overhead cost. The company assigns overhead cost to jobs using the predetermined overhead rate of $19.80 per direct labor-hour. During May, the following activity was recorded:

Raw materials (all direct materials):
Beginning balance	$ 17,700
Purchased during the month	$20,300
Used in production	$35,900
Labor:
Direct labor-hours worked during the month	2,450
Direct labor cost incurred	$30,380
Actual manufacturing overhead costs incurred	$38,800
Inventories:
Raw materials, May 30	?
Work in process, May 30	$18,200

Work in process inventory on May 30 contains $2,728 of direct labor cost. Raw materials consist solely of items that are classified as direct materials.

The balance in the raw materials inventory account on May 30 was: