Amy Fontinelle is a freelance writer, researcher and editor who brings a journalistic approach to personal finance content. Since 2004, she has worked with lenders, real estate agents, consultants, ...

The world of microeconomics and business decision-making hinges upon a key concept: marginal cost. In the simplest terms, marginal cost represents the expense incurred to produce an additional unit of ...

Your payment is calculated based on your chosen interest rate and repayment period. The type of loan (interest-only or amortizing) will determine the loan payment formula and how interest is ...