How to Use MathCAD Spreadsheet within Excel

Hi,

I have a MathCAD spreadsheet that I would like to use in Excel.

What I want it to do, quite simply, is this:

In Excel, I have about 10 inputs. I want to take these inputs, and put them into variables in MathCAD.

The MathCAD sheet will then do its calculation and return 1 variable.

I will take that 1 variable, and put it back into Excel.

How do I get Excel to do this?

Thanks