var john = {
    fullName: 'John Smith',
    bills: [124, 48, 268, 180, 42],
    tipsCalc: function(){

        this.tips = [];
        this.finalValues = [];

        for (let i = 0; i < this.bills.length; i++) {


            // Determinate percentage based on tipping rules
            var percentage;


            if (this.bills[i] < 50) {
                percentage = .2;

            }else if (this.bills[i] >= 50 && this.bills[i] <200) {
                percentage = .15;

            }else{
                percentage = .1;

            }

            // Add results to the corresponing arrays

            this.tips[i] = this.bills[i] * percentage;
            this.finalValues[i] = this.bills[i] + this.bills[i] * percentage;
        }
    }
}


john.tipsCalc();
console.log('John's Family TIPS ' + john.tips);
console.log('John's Family BILLS ' + john.bills);
console.log('John's Family Final a pagar ' + john.finalValues);

console.log('---------------------------------------------------');

var mark = {
    fullName: 'Mark Miller',
    bills: [77, 475, 110, 45],
    tipsCalc: function(){

        this.tips = [];
        this.finalValues = [];

        for (let i = 0; i < this.bills.length; i++) {


            // Determinate percentage based on tipping rules
            var percentage;


            if (this.bills[i] < 100) {
                percentage = .2;

            }else if (this.bills[i] >= 100 && this.bills[i] < 300) {
                percentage = .1;

            }else{
                percentage = .25;

            }

            // Add results to the corresponing arrays

            this.tips[i] = this.bills[i] * percentage;
            this.finalValues[i] = this.bills[i] + this.bills[i] * percentage;
        }
    }
}


mark.tipsCalc();
console.log('Mark's Family TIPS ' + mark.tips);
console.log('Mark's Family BILLS ' + mark.bills);
console.log('Mark's Family Final a pagar ' + mark.finalValues);

var sum = 0;
var averageTips;

function average(family) {

    for (let i = 0; i < family.tips.length; i++) {

        sum += family.tips[i];
    }

    return averageTips = sum / (family.tips.length);
}

console.log('---------------------------------------------------');

average(john);
console.log('John's Family Suma TIPS = ' + sum);
console.log('John's Family Average TIPS = ' + averageTips);

console.log('---------------------------------------------------');

average(mark);
console.log('Mark's Family Suma TIPS = ' + sum);
console.log('Mark's Family Average TIPS = ' + averageTips);