fundraisingAmounts.pick = function(source, currency, country) {
    /*
     * Select the correct amount or array of amounts from object in "source"
     * In future may extend to allow a language parameter too
     * 
     * @param {object} source   - the amounts object e.g. fundraisingAmounts.asks, fundraisingAmounts.averages
     * @param {string} currency - ISO code of currency
     * @param {string} country  - ISO code of country (optional)
     * @return {array/number}   - depending on source
     */

    if ( source[currency]["default"] ) { // we need to go deeper
        if ( source[currency][country] !== undefined ) {
            return source[currency][country];
        } else {
            return source[currency]["default"];
        }
    } else {
        return source[currency];
    }
};

function convertAsk(amount, currency, country) {
    /*
     * Given an amount in USD, find an "equivalent" local ask amount for the given currency and country
     * @TODO: namespace this
     * 
     * @param {number} amount   - USD amount
     * @param {string} currency - ISO code of currency
     * @param {string} country  - ISO code of country
     * @return {number}         - local amount
     */
    var usdbase = [3, 5, 10, 20, 30, 50, 100];
    var usdamount = parseInt(amount, 10);
    if(isNaN(usdamount)){
        return 0;
    }
 ...