Troubleshooting:Copying an Array function within a table. Error

Copying an Array function within a table.

I have a large spreadsheet with data that has been accumulated over time and in different locations.  I want keep the original data and create a normalized average based on multiple modification factors.  I also don't want any items without an entry to be
considered in the average.  The example below works correctly, but I wonder if there is a better way.
 

Adjusted Average Item 1 formula--=SUM([Item 1]*$B$1/[Index])/COUNTIF([Item 1],">0")
First question: is this the best formula to use?  I tried to use the AVERAGEIFS function, but I couldn't get it to perform the math to the items prior to calculating the average.
Second question, is there a way to copy the formula to all 500 items?  Dragging to the average for Item 2 still keeps the formula exactly as it is for Item 1.
 
Thanks in advance,
Chris

Keys to the Problem Copying an Array function within a table.

Download SmartPCFixer to Fix It (Free)

Try this, in cell E7
=SUMPRODUCT(E3:E6*$B$1/$D$3:$D$6)/COUNT(E3:E6)
Change the 6s to the row number just above the cell where you enter the formula.  For example, if you have 1000 values, in cell E1001 enter
=SUMPRODUCT(E3:E1000*$B$1/$D$3:$D$1000)/COUNT(E3:E1000)
and then copy to the right for 500 columns.

HTH, Bernie

Manually editing the Windows registry to fix Error Copying an Array function within a table.

Caution: Unless you an advanced PC user, we DO NOT recommend editing the Windows registry manually. Using Registry Editor incorrectly can cause serious problems that may require you to reinstall Windows. We do not guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

• Click the Start button.
• Type "command" in the search box... DO NOT hit ENTER yet!
• While holding CTRL-Shift on your keyboard, hit ENTER.
• You will be prompted with a permission dialog box.
• Click Yes.
• A black box will open with a blinking cursor.
• Type "regedit" and hit ENTER.
• In the Registry Editor, select the Error 0x9C-related key (eg. Windows Operating System) you want to back up.
• From the File menu, choose Export.
• In the Save In list, select the folder where you want to save the Windows Operating System backup key.
• In the File Name box, type a name for your backup file, such as "Windows Operating System Backup".
• In the Export Range box, be sure that "Selected branch" is selected.
• Click Save.
• The file is then saved with a .reg file extension.
• You now have a backup of your MACHINE_CHECK_EXCEPTION-related registry entry.

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