1. Add CRUD for area table. Content: id, area. Set Area menu under master data
2. On customer database add limit_piutang field type data double
3. Add field area field on database it will connected to area table
4. Add new link title: Contact. The content same with "Toko" links without Nama Toko field
5. Add new Link title: Dokumen. Content: name, file(upload image file), display image from uploaded file
6. Add new link title: History Visit. Content: visit_date, visit_time,description, image