move.js

function getMilk(money, costPerBottle) {
    console.log("move to store to buy milk");

//     var numberOfBOttles = Math.floor(money / 1.5);

//     console.log("buy " + numberOfBOttles + " bottles of milk");

console.log("buy " + calcBottles(money, costPerBottle) + " bottles of milk");

    console.log("go back to home");

//     return money % 1.5;
        return calcChange(money, costPerBottle);
}

// var change = getMilk(4);
// console.log(change);

function calcBottles(startingMoney, costPerBottle){
    var numberOfBOttles = Math.floor(startingMoney / costPerBottle);

    return numberOfBOttles;
}

function calcChange(startingAmount, costPerBottle) {
    var change = startingAmount % costPerBottle;
    return change;
}

console.log("Hello master, here is your " + getMilk(5, 1.5) + " Change.");