vlookup/match/index function?

Ok so right now I have two formulas that I am using as I have two different charts.

In cell D3: =VLOOKUP(B1,B8:G11,HLOOKUP(C3,B6:G7,2,FALSE),FALSE)
Using the data in B6:G11

In cell D4: =INDEX(D15:D27,MATCH(1,IF(B15:B27=B1,IF(C15:C27=B4,1)),0))
Using the data in B13:G27

In cell C3 I have a list and can use the drop down and D3 will automatically change the data in D3.

That’s what I want for cell D4 too, but I have both cell B4 and B5 that I want to use as drop downs.

Does anybody have any ideas? Just an fyi I have downsized my data to simply things.

Thanks