1. Name three things necessary to make a fair trade. 2. Set up this sentence like an algebra problem: Thomas Fitzpatrick equally traded 1 buffalo robe (b) for 2 chocolates (c). Now solve. If 1 buffalo robe is $3, how much is each chocolate worth? Objective Students will identify trade goods and their approximate worth in dollars so that they can establish fair trades as practiced during the fur trade era. They will generate algebraic expressions to represent these exchanges. Background Intro: Bent’s Fort began as a trading post in the southern plains during the 1830s. People who visited the po Duration: 60 Minutes.