Firm a Produces Something That Firm B Uses as an Input

Multiple Choice

Firm A produces something that Firm B uses as an input. The product of Firm B, in turn, is purchased and used as an input by Firm C, and so on down the line through Firm E, which produces the end product. The total value added by Firms A-E from the production of the end product described here is:

A) $3,000
B) $3,800
C) $6,500
D) $10,300