The following information is needed to reconcile the cash balance:

$$ A deposit of $$5800$ is in transit.

$$ Outstanding checks total $$1200.$

$$ The book balance is $$6400$ at February $28,2019.$

$$ The bookkeeper recorded a $$1700$ check as $$17,200$ in payment of the current month's rent.

$$ The bank balance at February $28,2019$ was $$15,640.$

$$ A deposit of $$200$ was credited by the bank for $$2000.$

$$ A customer's check for $$3400$ was returned for nonsufficient funds.

$$ The bank service charge is $$60.$

What was the adjusted book balance?