How do I Import customers from a .csv file? What is the difference between customer and supplier setup? Where and how can I set the payment terms for a customer? How do I create a new Customer? Can I have a contact who is both a customer and a supplier? How do I import/export contacts? How do I create a new transaction for a customer? If I modify the address of my contact, will that reflect in the previous invoices created for this contact? Can I delete a customer or supplier? Can I have different price tiers for my customers?