Which of the following are elements of a valid contract?

The last link in the channel of distribution is the

Taxes on imported foreign goods are also known as

If Karamo who lives in The Gambia imports goods from Senegal and later sells them in Guinea Bissau; Karamo is engaged in

Manufacturers may sell goods directly to consumers where goods are i. made to customer's specification ii. advertised by the manufacturer iii. perishable iv. highly technical v. widely demanded