RATIO CALCULATIONS Assume the following relationships for the Caulder Corp.: Sales/Total assets 2x Return on assets (ROA) 4% Return on equity (ROE) 10% a. Calculate Caulder's profit margin assuming the firm uses only debt and common equity, so total assets equal total invested capital. Round your answer to two decimal places. % b. Calculate Caulder's debt-to-capital ratio assuming the firm uses only debt and common equity, so total assets equal total invested capital. Round your answer to two decimal places. %