Quantitative methods have become essential in economic forecasting, allocation of resources, portfolio analysis, inventory analysis, data-mining, and new and innovative solutions to myriad social and climate challenges. The aim of this text is to provide a basic understanding of these quantitative methods. Using topics such as finite mathematics, mathematics of finance, differential calculus, optimization, and curve fitting, this text provides the tools needed to solve modern business problems. The book features numerous business applications including cash flow, amortization, interest, loans, annuities, revenue/cost models, break-even, ordering, inventory control, profit/margin models, econometrics and more.