A company supplies two products, DVD discs and DVD storage cases, to two different segments of customers $(1$ and $2).$ The following table summarizes the value that the typical customer in each segment assigns to the products offered.

Customer Type Discs Cases

$1$ $$6$ $$8$

$2$ $$7$ $$5$

Assume that there are $10$ customers of each type, that there are no fixed costs, and that the marginal costs of producing discs and cases are both constant and zero.