Header minimal: barcode,name. Opsional: unit,buy_price,sell_price.
barcode,name,unit,buy_price,sell_price 8999999999999,Indomie Goreng,pcs,2500,3500 8991111111111,Aqua 600ml,pcs,2000,3000
Format per baris: barcode,name,unit,buy_price,sell_price (tanpa header). Boleh dipisah koma atau tab.