Customers CSV
The `customers.csv` file should have the following format:
CustomerID CustomerName
ABC PT. CONTOH1
DEF PT. CONTOH2
GHI PT. CONTOH3
...
Items CSV
The `items.csv` file should have the following format:
ProductID ProductName
ITEM1 ITEM CONTOH1
ITEM2 ITEM CONTOH2
ITEM3 ITEM CONTOH3
...