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Order by title, catalog number if there is one, and complete price with code letter. How to find what you need on this site. This book offers valuable overviews of course work and extra help with difficult subject areas. This volume includes all the essentials in one clear volume, including math fundamentals, quantitative word problems, exercises, tests with answers, puzzles, and amusing cartoons. Learn to figure sales tax, discounts, tips, overtime pay, commissions, averages and probability.