 In order to prepare the commercial proposal, once the scope of the proposed solution is finalized, the sales engineer is typically also in charge of gathering all the inputs from internal stakeholders (i.e.Product, R&D, Delivery, Services, Finance, Legal, etc) so that Profit and Loss (P&L) can be calculated, pricing can be established and final commercial proposal can be approved and submitted to the customer.Sales engineers also collaborate with the design, production, engineering, or R&D departments of their companies to determine how products and services could be made or modified to suit customers' needs.