I need help finding the formula to use to input in my excel sheets. There are many more rows but this is all I could fit in my screenshot.

Question: Create a new worksheet to compute gross revenues by month and region, as well as worldwide totals, for each product using the data in Mower Unit Sales and Tractor Unit Sales.

Gross Revenues Prices for PLE products for the past 5 years: Gross Revenues Mowers Gross Revenues Tractors Gross Revenues Prices for PLE products for the past 5 years: Gross Revenues Mowers Gross Revenues Tractors