Count data cells with multiple criteria

[DaveWoollven]

I'm hoping you kind forum members can help me.

I looking for a formula where I can count the number of cells with data included, depending on criteria from two other columns.

In my example I want any cells with data in column A counted if a "Joe Bloggs" is recorded in column D and there is no data in column K

I've tried to work COUNTIF and SUMPRODUCT but cannot get the formula right for both criteria points.

Any help would be gratefully received. 

[#2]

@DaveWoollven 

Perhaps

=SUMPRODUCT( (A:A<>"")*(D:D="Joe Bloggs")*(K:K="") )
or
=COUNTIFS( A:A,"<>",D:D,"=Joe Bloggs",K:K,"")

[#3]

@Sergei Baklan that worked a treat, thank you!

[#4]

@DaveWoollven , you are welcome