Erplain is a real-time inventory and order management tool for business-to-business transactions that automates the creation of sales orders, invoices, and purchase orders. Erplain accepts multiple price ranges (retail price, wholesale price). Assemblies and kits allow you to manage and create elements (kits). Using batch/lot numbers and expiration dates, you can also track items. B2B store customers have access to a personalized online store for self-ordering.