Follow these steps to calculate your average adjusted typing speed:

1. Click once in cell A8 of your Typing Test spreadsheet
2. Type 'Average Adjusted Speed' and press ENTER
3. Take your mouse and click-and-drag from cell B3 down to cell B6.  This should select all of the numbers in column B. 
4. Click the FUNCTIONS button and choose AVERAGE then press ENTER
5. The number that appears in cell B8 is the average adjusted speed from all 4 of your typing tests.