The unreported underground economy represents about 1 percent of U.S. GDP

The value added of a producer is the

A) total amount for which all its products sell minus its change in inventories. B) value of its total sales once externalities are accounted for. C) value of its output minus the value of the inputs it purchases from other producers. D) quality-adjusted amount of its total sales less any commissions paid.

The Sudsy Soda Company will not sell its soft drinks to a restaurant unless that business also buys paper cups from Sudsy. This requirement is an example of

A) product versioning. B) tie-in sales. C) price differentiation. D) complementary pricing.