Foreign currency analysis of Merck & Co. which is s an American multinational pharmaceutical company and one of the largest pharmaceutical companies in the world.

Explain the business activities and environment of Merck & Co. from the perspective of foreign currency and identify three currencies that Merck & Co. is exposed against. This can be due to its business structure (i.g. location of factories, customers and suppliers, and the currency that the products/services are quoted), and arising from the competition against its rivals. State the rationales of your selection and references.