Thompson Corporation gathered the following reconciling information in preparing its October bank reconciliation:

Cash balance per bank, 10/31	$17,000
Note receivable collected by bank	4,800
Outstanding checks	6,500
Deposits in transit	3,000
Bank service charge	50
NSF check	2,300

Using the above information, determine the cash balance per books (before adjustments) for Thompson Corporation.

$15,950

$11,050

$19,450

$11,150