Since you made two trades, you divide by two, for an average trade price of $110. Here's the formula used to calculate the average trade price in the example above. How to calculate the weighted ...

Average revenue per unit (ARPU ... Image source: Getty Images. The formula for calculating ARPU is pretty straightforward. Simply divide the total revenue by the number of subscribers.

Here are the simple formulas for calculating your gross annual income ... it helps to track or estimate your average weekly hours worked so you can get a more accurate annual calculation.