how do i calculate principle and interest

Add deposit of May 31, not recorded by bank v 580.34 12,277.38 Deduct outstanding checks: v No. 613 137.50 No. 628 837.70 No. 634 503.30 1,478.50 Adjusted balance 10,798.88 Cash balance according to Rancho Foods 6,491.88 Add: Proceeds of note collected by bank: v Principal Interest V Add: Error in recording May 9 deposit as $189.24 by the company instead of $819.24 630 Add: Error in recording Check No. 625 as $185.63 by the company instead of $158.63 v LZ 4,817.00 11,308.88 Deduct: Check returned because of insufficient funds 450 Deduct: Service charges v 60 510 Adjusted balance 10,798.88 Check My Work Previous L 84% 8:42 /13