Question: Assume your mother in law heard that you prepared the budget for the high school reunion picnic and has asked if you could help her to make a monthly household budget. She has created categories for groceries, entertainment, credit cards, mortgage, and utilities. She wants to track her expenses for a couple of months before she creates her budget considering that she has no idea how much she spends in certain areas. While she feels confident in collecting the data and entering it into an Excel workbook, she is unsure of what type of formulas or functions she might need to use and is not sure of the difference between a formula and a function. Explain to your mother-in-law the difference between formulas and functions, and then give her one example of how she might use each in her budget.