Sumif with three intersecting values

I have a Table with three columns: I.D., Condition, and User Defined Field 4. The table is unsorted, and sorting it would be difficult due to how it is imported. There are multiple entries for each I.D.

On a seperate page, I extract all unique values from each of the three columns.

You can then place check marks next to each unique Condition and unique User Defined Field 4 for them to be considered in the calculations.

The calculations are performed on each unique I.D.

For each I.D., I need to sum up all the values for the all of the checked unique User Defined Field 4 values, but they should be summed only if the respective Condion is one of the checked unique conditions.

I'm having a very hard time describing this without the workbook, so I just attached a scrubbed version for clarity.

On the Calculations tab, under Conditional Events, I was able to get it to sum all of the conditional events if the box under conditional event is checked, however it doesn't take into account Event Count. I need that additional condition.

The way I was doing it was nested if statements, but adding the additional condition would mean I would have up to 20 events and 20 conditional events, so 400 nested if statements for one cell. I'm sure there's a better way.

I wish I could describe this better, unfortunately this is the best I could manage.

Thanks for any help you can give,
Steve