P3 Kill-A-Watt Electricity Usage Monitor with Cost Caculation for $29.99 Shipped

P3 Kill-A-Watt P4460 Electricity Usage Monitor for $29.99 shipped.  Here is a screenshot for your reference.  Note that it is also available here for $35.81 shipped.  Kill-A-Watt is a tool that helps identify power-hungry devices by measuring their actual usage.  This is a newer version that includes cost calculation in addition to power usage and other related measurements.  We have a couple of them and have found them to be, uh, fun, amusing, and more importantly, very useful.  Here is a review for your reference.  As a comparison, Home Depot has it for $49.