adding and subtracting two formulas in excel

I'm trying to add the value of two separate functions in Excel, and have the sum placed into a different cell on a different page in the same spreadsheet. I need help on how exactly to do this. Thanks in advance.

 

One cell has the result of a function. So do all the others. I need to take those results and add them all up into another cell on a different page.

 

If you're trying to get the sum of more than 2 cells, Select the cell where you want to get the answer then command =Sum(Select all the cells that you want to add up)