Beginning inventory, purchases, and sales for WCS12 are as follows:

October 1	Inventory	320 Units at $10
October 13	Sale	180 Units
October 22	Purchase	360 Units at $12
October 29	Sale	300 Units

Assuming a perpetual inventory system and using the weighted average method, determine (a) the weighted average unit cost after the October 22 purchase, (b) the cost of goods sold on October 29, and (c) the inventory on October 31.