A partial adjusted trial balance of Piper Company at January 31, 2014, shows the following.

PIPER COMPANY ADJUSTED TRIAL BALANCE JANUARY 31, 2014
		Debit			Credit
Supplies		$830
Prepaid Insurance		3,180
Salaries and Wages Payable					$930
Unearned Service Revenue					880
Supplies Expense		950
Insurance Expense		530
Salaries and Wages Expense		1,930
Service Revenue If $1,730 was received in January for services performed in January, what was the balance in Unearned Service Revenue at December 31, 2013?					2,130