A back-end database containing the data that your business works with. This will contain up to 10 tables with appropriate relationships. You can think of a table as representing an entity (such as a product, customer, order, order line, etc.) and containing the data needed to manage that entity (such as product name, product number, price, number in stock, etc.)
Note that the stated delivery time is for delivering the first version for acceptance testing. Additional time (included in the price) may be needed to tweak the database to your satisfaction.