Q. I was excited to see the article about ways to calculate depreciation in Excel, especially when I saw one of them was double-declining balance (DDB). As tax professionals, we’re always trying to ...

Mathematical models are a way to attempt to predict the probable outcome of a complex situation. From climate, stock market and physics models, you can use mathematical formulas to determine a range ...

A seasonal index is a way of measuring the seasonal variation -- that is, to measure the change that is due to seasonal changes in demand -- of a variable, typically sales. For example, a beachfront ...

It creates a reusable function that takes three inputs: actual sales, sales quota, and a weighting factor. It returns a weighted performance score by dividing sales by quota and multiplying by the ...