Using Date Range in Countifs formula

Good morning, everyone. First time to this site and first time poster (I normally use MS Office's Discussion Groups but they are down for some reason.) I have a problem that I am trying to figure out and for the life of me I can't.

Situation is as follows:
2 sheets, one is dB_File and the other is Sheet_2
On Sheet_2, I have a reporting period date listed in cell G1, formatted mm/dd/yyyy, and the employee number in cell G13.
On dB_File, I have a list of sales, with all the details of the particular sales. Column B has the employee number associated with a particular sale. Column BQ has the date that the sale was made.
Back to Sheet_2, in cell G17, I am trying to count the number of sales an employee made in a particular MONTH. But I don't know how to structure my countifs criteria so that it counts all sales made in a month, not just a day. Here is what I have so far.

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I want this particular cell to count all of the sales made 3 months before the current reporting period. So, if I am working on April's reporting period, I want to know all of the sales made during the month of January. Any help would be greatly appreciated.

To best describe or illustrate your problem you would be better off attaching a dummy workbook, the workbook should contain the same structure and some dummy data of the same type as the type you have in your real workbook - so, if a cell contains numbers & letters in this format abc-123 then that should be reflected in the dummy workbook.

If needed supply a before and after sheet in the workbook so the person helping you can see what you are trying to achieve.

Doing this will ensure you get the result you need!