Suppose That an Economy Produces 40,000 Units of Good a Which

Suppose that an economy produces 40,000 units of good A which sells at $4 a unit and 20,000 units of good B which sells at $5 per unit. Production of good A contributes

A) 2 times as much to GDP as the production of good B.
B) 8/5 times as much to GDP as the production of good B.
C) 5/4 times as much to GDP as the production of good B.
D) 4/5 times as much to GDP as production of good B.