please help me,

Midwest Pool Co. provides for doubtful accounts based on 1.5% of credit sales. The following data are available for 2015.

Credit sales during 2015$1,050,000

Allowance for doubtful accounts 1/1/158,500

Collection of accounts written off in prior years

(customer credit was reestablished)4,000

Customer accounts written off as uncollectible during 2015 15,000

What is the balance in the Allowance for Doubtful Accounts at December 31, 2015?