How to Compare row values using another row value - see description
I have data like given below. I am trying to compare the latest year (ie 2018) data with 2017 and wanted to know if there are any new models added / deleted in the data. In this data we can see 102 got deleted and 105 got added. So I am trying to create a calculation where it shows one data got deleted and one got added, This calculation should work for rest of the months as well like feb 2018 compared to feb 2017. How can I do this?
Product Desc Product Model
Jan 2018 105