JB Adams Inc. had the following purchase transactions in May

Date of Purchase Number of Units Cost per Unit Total Cost

May $5500$ $$4$ $$2,000$

May $10700$ $$6$ $$4,200$

May $15400$ $$4\mathrm{.}501,800$

Adams sells $1,600$ units on May $30$ and uses the Weighted Average method of inventory costing. What is Adams' Ending Inventory?