20230921 Pikairos JustKNIMEIt Season 2 Challenge 26 Calculating Sales Performance
You work for a company that sells two products: Product A and Product B. As a data analyst, you want to calculate how sales increased or decreased for both products over a period of 12 months, on a monthly basis. In the end, you want to have a table with columns indicating the increase/decrease percentages of sales per month, as in the example below.