FIFO method

Inventory transactions October:

Description #bottles cost/bottle

OCT 1, beginning inventory 31 $165

OCT 8, purchase 9 $169

OCT 12, purchase 4 $167

OCT 20, purchase 6 $160

Summary

#bottles sold - 40

Selling prices/bottle - $206

Calculate:

Cost of goods sold month ended OCT 31 -

Ending inventory as of OCT 31 -

Gross profit month ended OCT 31 -

Please show work. I'm really trying to understand this. Thank you.