During $2021,$ a company sells $25$ units of inventory. The company has the following inventory purchase transactions for $2021$:

$\backslash$table$[[,$Transaction,Number,Unit,Total$],[$Date$,$of Units,Cost,Cost,$],[$Jan$.1$ Beginning inventory,$20,$$$55,$$$1,100,],[$Sep$.8$ Purchase,${10}_{?},50,500,],[,{30}_{?},,$$$1,{600}_{?},]]$

Calculate ending inventory and cost of goods sold for $2021$ assuming the company uses the weighted$-$average cost method. $($Round weighted$-$average unit cost to $4$ decimal places. Round your final answers to the nearest dollar amount.$)$

$\backslash$table$[[$Ending inventory$],[$Cost of goods sold$]]$