Excel work

You need to be expert in Excel. And you have to know how to create a tutorial in form of notes on how you did this job steps by steps with details. The job is to work with columns and rows of 2 different excel pages to put them in one unique page, the 2 columns have a commune columns called "Products". But the "Products" column in the first page has s has more than the "Products" column in the second page. Even the second column has some rows that are not on the first page. Every one has some extra rows that not on the other page. The idea is to add them and not miss any information and to put every thing on one unique page. The product numbers who are the same on the 2 pages in "the "Products" columns have rows with some cells the same and others different. So the unique page must have those numbers not doubled but all the information in cells in their row must be added from both pages even if doubled. It same complicated but it is not. Few formulas wld do all the work, but most important is adescription steps by steps how you did it. I pay fix amount of $30. I will attache the excel file here. Must be no error and the job must be done before Thursday 9PM New york time.