Totaling multiple columns

I have a spreadsheet that contains about 3000 rows of data. For each row, I need to calculate a total quantity amount for each unique account number.

The way I need the spreadsheet to calculate totals is: if all values in columns A, F, G, H in row 3 are all equal to same columns in row 2, then total the value in column E for rows 2 & 3. I can write a formula for this, but the problem I am running into is if there are more that 2 rows involved.

Please see attached spreadsheet for what spreadsheet should look like. All the calculations are to take place in column J.

Thanks