How do I solve this kind of problem?

A company's Cash account shows an ending balance of $4,200. Reconciling items included a bookkeeper error of $50 (a $550 check recorded as $600 ), two outstanding checks totaling $800, a service charge of $25, a deposit in transt or $260, and interest revenuc of $31. What is the adjusted book balance? A. $4,740 B. $3,660 C. \$4,256 D. $4,144