Select Based on 2 search criteria

Hello,

I have an Excel Sheet with three columns of data. In a separate worksheet, I am setting up some calculations. To do so, I am having the user select from a drop down list, the data in the first and second columns. Based on the two values selected by the user, I would like to bring forward the value in the third column. Can someone please help me out with the formula to do so?

Thanks in advance