If you help me reach US pharmacies businessmen who need my product, you must pay in advance, I can deliver. If the pharmacy merchant advance money, I have money, we can successfully sell products to the United States.
If you help me contact an American pharmacy merchant, they need my product and must pay in advance before I can ship it. If the drugstore merchant had paid the money in advance, I would have the money to sell the product to the United States.
If you can contact the American drugstore merchants for me, they need my products, and I can't deliver them until I pay in advance. If the drugstore merchant pays in advance, I will have money and be able to sell the products to America smoothly.