KNOWLEDGE is required to perform basic math, including calculations using fractions, percents, and/or ratios; understand written procedures, write routine documents, and speak clearly; and understand complex, multi-step written and oral instructions. The usual and customary methods of performing the job''s functions require the following physical demands: some lifting, carrying, pushing, and/or pulling, some stooping, kneeling, crouching, and/or crawling and significant fine finger dexterity.