KDGL considers the following additional constraint for its shipping plan: the total amount shipped to the Washington distribution center cannot be less than the total amount shipped to the Denver distribution center. Which algebraic expression below corresponds to this constraint?

This question relates to the KDGL example introduced in Session 3, and tests your understanding of the algebraic model formulation. You can answer it without using Excel. Only use Excel if you cannot answer this question otherwise.

KDGL considers the following additional constraint for its shipping plan: the total amount shipped to the Washington distribution center cannot be less than the total amount shipped to the Denver distribution center. Which algebraic expression below corresponds to this constraint?