Exercise $9-13($Algo$)$ Retail inventory method; average cost $[$LO$9-3]$

San Lorenzo General Store uses a periodic inventory system and the retail inventory method to estimate ending inventory and cost of goods sold. The following data are available for the month of October:

$\backslash$table$[[,$Cost,Retail$],[$Beginning inventory,$$39,000,$$$54,000$

$\backslash$table$[[,$Cost,Retail$],[$Beginning inventory,$$39,000,$$$54,000$

$\backslash$table$[[,$Cost,Retail$],[$Beginning inventory,$$39,000,$$$54,000$