Instruction: Demonstrate how you would use array functions combined with dynamic array formulas to analyze a dataset containing sales data across multiple regions and product categories. Focus on calculating year-over-year growth and market share changes.
Context: This question evaluates the candidate’s expertise in manipulating and analyzing large datasets using modern Excel features like dynamic arrays and array functions. It tests the ability to derive business insights from data through advanced formula constructions.
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First, let's clarify the term "year-over-year growth." It refers to the percentage increase in sales from one year to the next. To calculate this, I would use the formula: ((This Year Sales - Last Year Sales) / Last Year Sales) * 100. This formula gives us a clear percentage that indicates the growth or decline in sales over a year.
For market share changes, we're looking at how each product category or region's sales as a percentage of total sales have shifted year over year. The formula here would be: (Category Sales / Total Sales) * 100. Comparing these percentages year over year would indicate how the market share has evolved....