Question: The question that I need help solving is the Totals. The formula uses =SumProduct, but I have not been able to figure out the exact

The question that I need help solving is the Totals. The formula uses =SumProduct, but I have not been able to figure out the exact formula. The other posts are not making sense, and I am confused. If someone could explain with different examples, say from the work I have already done, that would be excellent!!
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