Went to NAPA and bought some stuff to do some general maintenance on my car. Totalled about $110 so I asked about a discount I could get from school. He said alright, punched it in, and it totalled around $85 or so. He said "hmm", then punched some other code in and bam, price drops down to $66. Guy says "that's better", so I happily give him my money and leave satisfied. Safe to say I was NOT expecting that.