A company's Cash account shows an ending balance of \$4,000. Reconciling items included a bookkeeper error of $80 (a $550 check recorded as $630 ), two outstanding checks totaling $810, a service charge of $20, a deposit in transit of $280, and interest revenue of $33. What is the adjusted book balance? A. $3,470 B. $3,907 c. $4.530 D. $4,093