## Challenge 62 - Produce the Sum for Merged Cells Headers

Download the workbook related to this challenge - **Sum for Merged Cells**

This time challenge is to produce the sum where header is merged cells. For the layout like below -

**You need to write a single formula which can be dragged right and down to generate the sum for below table**

*The solution to this challenge will be published after a month i.e. on 13-Jun-17.*