It doesn't matter how many instances of Car or Doll or Coloring exist, it will only sum up the columns C:?? if column B is the same as the value in your summary table field.

It's not doing a "PRODUCT" in the normal sense of the word, so my guess is you're unfamiliar with the function and how it works. The "PRODUCT" part of this is multiplying by 1 or 0, whether the condition is met or not.

If it's not working for you, upload a copy of your workbook here and note where you want to see the totals and what they should be if you manually calculated them.