The following events occur for The Underwood Corporation during 2015 and 2016, its first two years of operations.

June 12, 2015 Provide services to customers on account for $32,600.

September 17, 2015 Receive $18,000 from customers on account.

December 31, 2015 Estimate that 40% of accounts receivable at the end of the year will not be received.

March 4, 2016 Provide services to customers on account for $47,600.

May 20, 2016 Receive $10,000 from customers for services provided in 2015.

July 2, 2016 Write off the remaining amounts owed from services provided in 2015.

October 19, 2016 Receive $38,000 from customers for services provided in 2016.

December 31, 2016 Estimate that 40% of accounts receivable at the end of the year will not be received.

I just need help on figuring out the December 31, 2016 entry and how to get that please, thanks.