Initial Balance: 1202258.53 [PASS] After Capital Injection (+10k): Balance is 1212258.53 (Matches Expected) [PASS] After Purchase Payment (-5k): Balance is 1207258.53 (Matches Expected) [PASS] After Sale Payment (+8k): Balance is 1215258.53 (Matches Expected) [SUCCESS] All Accounting Logic is Penny-Perfect. Transaction Rolled Back (Data not saved, but logic verified).