On October $29,$ Lobo Company began operations by purchasing razors for resale. The razors have a $90-$day warranty. When a razor is returned, the company discards it and mails a new one from Merchandise Inventory to the customer. The company's cost per new razor is $$15$ and its retail selling price is $$90.$ The company expects warranty costs to equal $7\%$ of dollar sales. The following transactions occurred.

November $11$ Sold $70$ razors for $$6,300$ cash.

November $30$ Recognized warranty expense related to November sales with an adjusting entry.

December $9$ Replaced $14$ razors that were returned under the warranty.

December $16$ Sold $210$ razors for $$18,900$ cash.

December $29$ Replaced $28$ razors that were returned under the warranty.

December $31$ Recognized warranty expense related to December sales with an adjusting entry.

January $5$ Sold $140$ razors for $$12,600$ cash.

January $17$ Replaced $33$ razors that were returned under the warranty.

January $31$ Recognized warranty expense related to January sales with an adjusting entry.

$4.$ What is the balance of the Estimated Warranty Liability account as of December $31?$