You can use an SSI Script function in your skip condition called "NumChecked" to skip to a terminate question.
e.g. NumChecked(Q5)>2 would refer to "Skip if Q5 has greater than 2 responses".
If the answer you are seeking is more complex and has multiple codes representing a particular brand, then please provide the codes and brands information and I will put together a suitable solution using Perl within a constructed list.
Regards.