We are not required to know eveay single thing about every product in the store. When people ask for help we can make recommendations and help them as much as we can, but the amount of people who get incredibly angry with us because we can't walk them through step-by-step on how they're supposed to do some project... I work at customer service, and if I don't know the answer to a question I never just say "I don't know", I tell them that I'm not sure but that I'll ask someone else, who I know would know the answer, and 75% of the customers get pissed off because I don't know the answer right off the bat and they have to wait an extra 30 seconds for someone else to come answer their question. Like you're a 50 year old man and you don't know, yet you expect me to know.