See attached. I added tabs for all of the months and updated the summary tab to sort by cost 2 in descending order.
Upon further review combining the rank and the instance count could potentially create errors and I don't think is a good idea.
The date tabs go down 500 rows. If you have more than that you need to drag down the formulas in the blue columns AND update the bottom row of the range in the summary column so it picks up the whole range.
