# Sales

- [Customers](/fundementals/administration/sales/customers.md): Tool to manage customers in saaster
- [Invoices](/fundementals/administration/sales/invoices.md): Tool to manage invoices in saaster
- [Plans](/fundementals/administration/sales/plans.md): Creation and management of plans inside saaster
- [Modules](/fundementals/administration/sales/modules.md): Tool to manage modules in saaster