A summary of Klugman Company's December 31, 2018, accounts receivable aging schedule is presented below along with the estimated percent uncollectible for each age group:

Age Group	Amount				%
060 days	$	54,000			.5
6190 days		19,000			1.0
91120 days		2,400			10.0
Over 120 days		1,100			50.0

The allowance for uncollectible accounts had a balance of $1,340 on January 1, 2018. During the year, bad debts of $690 were written off. Required: Prepare all journal entries for 2018 with respect to bad debts and the allowance for uncollectible accounts. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.)