The accounting records of Wildhorse Electronics show the following data.

Beginning inventory		4,000 units at	$5
Purchases		8,500 units at	$7
Sales		10,000 units at	$10

Calculate weighted-average unit cost. (Round answer to 3 decimal places, e.g. 5.125.)

Determine cost of goods sold during the period under a periodic inventory system using the FIFO method, the LIFO method, and the average-cost method. (Round answers to 0 decimal places, e.g. 125.)