Changing set range to a variable range in macros

I recorded a macro in which I selected a range to paste values. The issue is that I need the macro to paste the values in a different column depending on a given set of criteria.
The criteria is as follows:[INDENT]For each set of data I have created a cell that tells me the desired location (row # and column letter) of the values[INDENT]I need the macro to look at those cells and from them know where to paste the values I selected.

Here is my current macro:

Dim x As Range
    x = ("D2")
    Dim y As Range
    y = ("C2")
    Range("D4:D21").Select
    Selection.Copy
    Windows("11053 - Item Summary.xlsm").Activate
    Range("x,y").Select
    Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
        :=False, Transpose:=False
End Sub

I feel like I am close but have been unable to run the macro without errors. Any help would be greatly appreciated.