The 501

Corndogs and shoestring advertisingHANABAMUNN WELCHGet in on the Corn Dog Craze!Sonic marketers emailed me a picture of two glorious corndogs — one with mustard, yum, and one with ketchup. Really? Ketchup on a corndog? But the picture needed the eye-catching red touch. I’m ad-sawy. Red sells. It’s a one-day special.Therefore, I’m going to have to drive to town — 25-mile roundtrip — to buy a 99…