A sales associate cannot accomplish a sale without completing basic mathematical calculations. A contractor cannot present a bid for a new job without carefully, accurately estimating areas, materials and labour costs. A production manager cannot determine his workers’ productivity without multiplying, dividing, and averaging. Obviously, payroll and preparation of pay checks absolutely depend upon the bookkeeper’s command of mathematical calculations. Further up the corporate ladder, managers and executives must manage and forecast profits and losses with sophisticated mathematical calculations; especially their assessments of the returns on their investments depend upon calculations of changes in percentages, and essential mathematical calculations in the financial world. Words drive sales and production; workers negotiate, motivate, and close deals with their language skills, but mathematical calculations drive the company’s profits and workers’ prosperity – the company makes money when supervisors, managers, and executives prove their mastery of mathematical calculations.