Excel provides many functions that are located in the formula tab in the function library. You can also enter a function by entering an equal sign in a cell, followed by the function name. Excel makes it easy by categorizing the functions into different groups. For example, you can click on the financial category in the function library and find various useful functions. One unique function called future value, is used to find a future return on an investment based on time, payments, and interest rate. I have generated a worksheet with real-world values that uses the future value function to determine profit, total investment, and future value.