I need help with this question

java uses the periodic inventory system and had the following inventory & sales activity for the month of june 2016:

Date

Activity

Quantity

Unit Price

5/1

Beginning Inventory

125

$10

5/5

Purchase

250

$12

5/15

Purchase

210

$14

5/25

Purchase

225

$16

Sales were 520 units at $20.  Using the LIFO method, determine the dollar value of Cost of Goods Sold for the month of May.