I need help with Number 3 please (the "Dec 31 Estimated that 10% of accounts receivable recorded to date would be uncollectible").: Outdoor Equipment (OE) sells camping equipment. On December 1, the accounts receivable account had a balance of $51,400, the bad debt expense account had a balance of $0, and the allowance for doubtful account had a credit balance of $5,140. Journalize the remaining journal entries for the 2017 year. Dec. 2 Sold tents for $5,280 on account with a cost of $2,640. 20 Determined that the total accounts of Rocky Co. with an accounts receivable balance of $1,340 and Grouse Co. with an accounts receivable balance of $2,640 were uncollectible and needed to be written off. 23 Unexpectedly received payment from Grouse Co. for $2,640. 31 Estimated that 10% of accounts receivable recorded to date would be uncollectible.

Also if you could please explain how you get the answer.. :)