I have this on my phone, and actually get quite a bit of mileage out of it. Mainly, over the years I've written price comparison functions for various size/wei

I have this on my phone, and actually get quite a bit of mileage out of it. Mainly, over the years I've written price comparison functions for various size/weight - price ratio and that sort of thing. Really comes in handy when competing manufacturers use wildly different sizes and prices to obscure the actual price point.