The Purchasing – A/P Module lets you manage all your vendor transactions. You can map the entire buying process, from purchase orders to vendor invoicing. Companies that import goods can use the landed costs functionality to calculate the purchase prices of their imported items, including customs, transport and insurance, fees, taxes, and other landed costs.

This is a screenshot of the Purchasing – A/P Module Menu in SAP Business One:

SAP Business One Purchasing A/P Module Menu