Alexandra's Boutique has the following transactions related to its top$-$selling Guccipurse for the month of October. Alexandra's Boutique uses a periodic inventory system.

$\backslash$table$[[$Date$,$Transactions,Units,Unit Cost,Total Cost$],[$October $1,$Beginning inventory,$6,$$$720,$$$4,320$

$4.$ Using weighted$-$average cost, calculate ending inventory and cost of goods sold at October $31.$