The final tallies for 2013 sales are in for the Chevy Volt and its little sister, the Chevy Spark EV. The results are ugly. While the Volt relies on both a gas engine and electric power, the Spark is actually an electric-only vehicle, assumedly designed to compete with the all-electric Nissan Leaf which had sales of 22,610 for the year. The Spark EV did not compete well, with sales for 2013 coming in at only 589 for the seven months in which it was offered. Chevy Volt sales for the year also disappointed, coming in at 23,094 and down from...