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A little bit of explanation might help:
*JavaScript variables generally need to be declared first, I have used 3 separate line each starting with '''var''', but you can list several variables on one line using a comma to separate them
*In my script it is important to define these variables outside the function as I will explain later
*The jQuery get request takes the api URL as first parameter and the function to deal with the returned result as third parameter
*The middle parameter is irrelevant in this context as only one object instance is returned, but if the qet was returning multiple results, "limit=1" would
*The function takes as its sole parameter an Object, this is what is returned by the api, the selected name can be any variable name
*In JavaScript if a variable is defined outside the function, then given a value inside the function, that value can be accessed by later code outside the function (in my case by code within the other functions for calculating each derived value)
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