Basic Research Report Calculation/Stats

I am producing a research report that requires data to be calculated. The data is fully structured. A uniform set of rows. There are a set of three main metrics that need to be calculated. I have an existing spreadsheet that needs to be updated. The same set of data is calculated for any particular calendar year. I need the spreadsheet to calculate the data for 2020 data. The calculations for 2017, 2018 and 2019 are already in the spreadsheet.