In finding the maximum quantity that can be shipped on the least costly route using the stepping-stone method, one examines the closed path of plus and minus signs drawn and selects the smallest number found in those squares containing minus signs.

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This statement is true. In the stepping-stone method, one examines the closed path of plus and minus signs and selects the smallest number found in those squares containing minus signs, which represents the maximum quantity that can be shipped on the least costly route.

In Finding the Maximum Quantity That Can Be Shipped on the Least