All data are fictional public teaching data. Use only supplied records. Report by transaction_date month, KRW, confirmed and refund records only. Deduplicate invoice_id; if fields conflict, hold until a correction ledger resolves them. Blank amount is unknown, not zero. Invalid dates need evidence. Keep source_row and correction IDs in each decision. Never alter or publish source files.
TASK: Prepare October 2026 reconciliation. Return (1) row decisions for all source rows with accepted/duplicate/conflict/outside-period/pending and evidence (2) accepted ledger (3) count, positive total, refunds, net (4) a short Korean report and an English counterpart. Explain limitations. Do not create code or call tools.
[export-a]
source_row,invoice_id,transaction_date,amount_krw,status
A01,O101,2026-10-01,120000,confirmed
A02,O102,2026-10-02,80000,confirmed
A03,O103,2026-10-03,150000,confirmed
A04,O104,2026-10-05,60000,confirmed
A05,O105,2026-10-32,90000,confirmed
A06,O106,2026-10-09,,confirmed
A07,O107,2026-10-12,50000,pending
A08,O108,2026-10-15,70000,confirmed
A09,O109,2026-09-30,40000,confirmed
A10,O110,2026-10-18,30000,confirmed
A11,O111,2026-10-20,-20000,refund
A12,O112,2026-10-22,130000,confirmed

[export-b]
source_row,invoice_id,transaction_date,amount_krw,status
B01,O103,2026-10-03,150000,confirmed
B02,O104,2026-10-05,65000,confirmed
B03,O113,2026-10-24,90000,confirmed
B04,O114,2026-10-25,200000,confirmed
B05,O115,2026-10-27,100000,confirmed
B06,O116,2026-11-01,180000,confirmed
B07,O117,2026-10-28,40000,confirmed
B08,O118,2026-10-30,70000,confirmed

[corrections]
evidence_id,invoice_id,field,value,reason
L1,O105,transaction_date,2026-10-23,Receipt date confirmed; raw day 32 is invalid
L2,O106,amount_krw,110000,Missing amount confirmed from fictional receipt
L3,O108,status,cancelled,Order cancelled before recognition
L4,O104,amount_krw,60000,A04 amount confirmed; B02 has a transcription error
