I'm looking for some help on trying to combine functions.
I think I need VLOOKUP & COUNTIF.
I have Sheet 1 with a list of clients, column A, I then have 12 other tabs Jan-Dec same table format on each, client listed in column C.
On sheet 1, I want to count from every month tab how many times listed (invoices sent) Not every client in the list will appear on the month invoice tabs , others more than once.
Please see screenshot attached
Any advice would be appreciated.
Thank you Amy