Stuck creating formula that sorts highest to lowest then sum quantity

[ZMAFC94]

Hello

I have attached a replica file which i will use to duplicate solution (if any) to live file - please can you take a look?

In the 'Main' sheet, cell B3, i am trying to return the shop with the highest quantity of 'complaints'; by adding up values in column M in the 'MON' sheet. The 'shop' range in the 'MON' sheet is in column E.

I would like to also return the counted quantity of that query, in D3, of the 'Main' sheet.

So in this example i am expecting shop '234' in B3 (main sheet) and '48' in D3. So '234' is the shop with most complaints, and the quantity of complaints was 48.

I'll copy the formula into the other cells in the 'Main sheet'. E.g. i'll do the same for Column E, H, & K (same with the counted quantity, column D, G, J & M)

I'll also copy these down to the other highlighted boxes.

I understand this might be a two part formula? Sort then sum? Not sure!

Hope this makes sense

Thanks
Z