Quick JS Question

QuickJSQuestion.js

var inventory = {
    '000001': {
        name: 'Banana Slicer',
        price: 2.99
    },
    '000002': {
        name: 'Three Wolves Tea Cozy',
        price: 14.95
    }        
};

function tenPercentOffOf (obj) {
    obj.price = Math.round(0.9 * obj.price * 100) / 100;
    return obj;
}

// INSTRUCTIONS
// 
// Please refer to the following Javascript variable declaration. When submitting your 
// application, please answer the following three questions at the top of your cover
// letter, before any salutations or headings.
//
// var bargainBananaSlicer = tenPercentOffOf(inventory['000001']);
//
// Question 1: After declaring that variable, what is the value of bargainBananaSlicer.price?
// Question 2: After declaring that variable, what is the price of the Banana Slicer 
//             in the inventory object?
// Question 3: Can you suggest ways to improve this code?