When a user asks for their statement, you're not pulling from a 'statements table', you're filtering the ledger to lines that touch their account and walking a running balance from the first entry forward. The closing balance is what the running sum lands on. NEVER cache running balance as a column; the moment a single insert misses the cache, your statement drifts from the ledger truth. Apply the three guided entries, then switch to the Statement view (top-left toggle) and pick different accounts to see how the same entries produce different statements.