I have some ficticious data for a project on a company. The financial data I have is summarized for the years of $2017-2021.$ I have aggregated revenue, cogs, operating expenses, and net income. In my sales revenue data I have date, product ID$,$ units sold, unit price, returns, and discount. Is there any way I can calculate the COGS by product? Since I only have it aggregated for the whole year, it seems I can't.