Closure to replace switch case

closureusage.js

var calculateTotal = function f(item) {
    var tax= 0.08;
    var fee = 10;
    var sinTax = 0.02;
    var h = {
        'gas': function(price) {
            return price + price*tax + fee;            
        },
        'wine': function(price) {
            return price + price*tax + price*sinTax;            
        }
    };
    return (typeof h[item] == 'undefined') ? 
        (function(price) {
            return price + price*tax;            
        }): h[item];
};

var total = calculateTotal('milk')(100);
alert(total);