For the cost of less than a first-class stamp you can get an ice cream cone tonight at Baskin Robbins. Their annual promotion of 31 cent cones runs this evening from 5 p.m. to 10 p.m. As it does every year, Baskin Robbins will be making a donation to the National Fallen Firefighters Foundation, which assists the families and coworkers of fallen firefighters. Get one of your 31 flavors at one of the numerous…