Unit of measure calculator

During the course of creating product catalogues, the need often arises to work out the unit of measure for a product. Surpised that such a thing didn't already exist online, I've made my own!

The first version was quickly pieced together as a proof of concept which was in use for several months. When I revisited the code to expand the options, I decided to completely rewrite it to take advantage of the template rendering of Underscore.js and standardised the form elements with Bootstrap 3.

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