Don't worry about it. I was just curious cause I thought it was kinda pricey. I have about 50 feet left over, and as often as I've had need for it in the past, it may last the rest of my life.....LOL
I know I bought 12/2. Maybe for some reason the 12/3 prices out different. I think half the time the prices are just based on what they sell the most of anyway.