4-7 Key Ratios (Continued) nWc nd. Cond Net oper. prof. margin after taxes 3.00% 5.00% Poor (NOPAT/Sales) Oper. capital requirement 4500%35.00%Poor (Net oper. capital/sales) Return on invested capital 667%14.00%Poor (NOPAT/Net oper. capital) Copy right C 2002 by Harcourt, Inc. All rights reserved4 - 7 Copyright © 2002 by Harcourt, Inc. All rights reserved. Key Ratios (Continued) NWC Ind. Cond. Net oper. prof. margin after taxes 3.00% 5.00% Poor (NOPAT/Sales) Oper. capital requirement 45.00% 35.00% Poor (Net oper. capital/Sales) Return on invested capital 6.67% 14.00% Poor (NOPAT/Net oper. capital)