Who has the most money.js

// You're going on a trip with some students and it's up to you to keep track of how much money each Student has.
// A student is defined like this:
//
// class Student {
//     constructor(name, fives, tens, twenties) {
//         this.name = name;
//         this.fives = fives;
//         this.tens = tens;
//         this.twenties = twenties;
//     }
// }

// As you can tell, each Student has some fives, tens, and twenties.
// Your job is to return the name of the student with the most money.
// If every student has the same amount, then return "all".
//
//     Notes:
//
// Each student will have a unique name
// There will always be a clear winner: either one person has the most, or everyone has the same amount
// If there is only one student, then that student has the most money



//==============mock=============================

class Student {
    constructor(name, fives, tens, twenties) {
        this.name = name;
        this.fives = fives;
        this.tens = tens;
        this.twenties = twenties;
    }
}


const andy = new Student("Andy", 0, 0, 2);
const stephen = new Student("Stephen", 0, 4, 0);
const eric = new Student("Eric", 8, 1, 0);

//==============mock=============================





function mostMoney(students) {

    if (students.length === 1) return students[0].name

    function sumMoney(student) {
        return (student.fives * 5) + (student.tens * 10) + (student.twenties * 20)
    }

    const arrMoney = students.map(s => sumMoney(s))

    let largest = {index: 0, num: arrMoney[0]}
    for (let i = 1; i <= arrMoney.length; i++) {
        if (arrMoney[i] > largest.num) {
            largest.num = arrMoney[i]
            largest.index = i
        }
    }
    let count = 0;
    for (let i = 0; i < arrMoney.length; i++) {
        if (arrMoney[i] === largest.num) {
            count++
        }
    }
    if (count > 1) {
        return 'all'
    } else {
        return students[largest.index].name
    }
}


mostMoney([andy, stephen, eric])