I want to sum value of col3 based on col1 and col2
here is the link of dummy data sheet in which I have shown sample table according to which I want sum of col 3 please guys check the sheet and suggest me some solution for it. https://docs.google.com/spreadsheets/d/1_MeiySJHI8OD84BPDOj_z57My-TXbs2ey4AOkQP3zug/edit?usp=sharing