Best Buy Saled Associate interview questions

I am adept with digital photography, computers, design software, particularly Macs and their applications, and complex home theatre systems, and I was responding to part-time openings (Weekend Warriors?) in these areas. I cold called Best Buy and asked for--and was granted--the interview because I did not receive a response to my online application. The interview scheduled for a Sunday morning started 15 minutes late (mine was the first of the day) and was conducted in a semi-public and busy setting. The questions asked were superficial and the session lasted about 20 minutes. If was clear from the start that I did not, as an older semi-retired commercial printing entrepreneur, match the profile the interviewer was seeking and, worse, I may have presented a perceived threat to her role as manager of computer, digital photography and home theatre systems. Needless-to-say, I did not receive any formal decision and was politely told the hiring manager was too busy to see me when I returned to the store in person asking for a follow up talk. I suspect the reason why had more to do my demeanor and background as a manager than my qualifications, but clearly I have to improve my presentation and persuasive skills if I truly want a part-time big box sales job--particularly when being interviewed by someone almost half my age.