date,channel,orders,revenue_krw,refunds
2026-07-01,search,10,500000,1
2026-07-02,search,12,660000,0
2026-07-03,email,8,360000,1
2026-07-04,email,15,750000,2
2026-07-05,social,9,405000,0
2026-07-06,social,11,550000,1