Heung-soo is responsible for checking a shipment of technology equipment that contains laser printers that cost $700 each and color monitors that cost $200 each. he counts 30 boxes on the loading dock. the invoice states that the order totals $15,000. which equation is not part of the system of equations that represents the number of each item? a. x + y = 30 c. (200x + 700y)30 = 15,000 b. 700x + 200y = 15,000