Update README.md

Signed-off-by: Fabiana 🚀  Campanari <113218619+FabianaCampanari@users.noreply.github.com>

Author: FabianaCampanari

README.md

@@ -1518,7 +1518,11 @@ u_1 = 0, leading to v_1 = 12, u_2 = 6, v_2 = 18, u_3 = -3, and v_3 = 37.
 
 ### - The improved solution after one iteration is not optimal. Continued iterations are required, focusing on variables like $x_{13}$ (reduced cost: $-6$) to further reduce costs.
 
+### - The transportation algorithm must repeat until all reduced costs are non-negative.
 
+### This analysis highlights the iterative nature of the transportation algorithm and the importance of accurately recalculating multipliers and reduced costs at each step.
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