index.js

let saveEl = document.getElementById("save-el")
let countEl = document.getElementById("count-el")
let totalEl = document.getElementById("total-el")
let childEl = document.getElementById("child-el")
let adultEl = document.getElementById("adult-el")
let count = 0
let total =0
let child = 0
let adult = 0

function increment() {
    count += 1
    total+=1
    countEl.innerText = count
    totalEl.innerText = total
}

function save() {
    let countStr = count + " - "
    saveEl.textContent += countStr
    countEl.textContent=0
    count =0
}
function childincrement()
{
    child += 1
    childEl.innerText = child
}
function adultincrement()
{
    adult+= 1
    adultEl.innerText = adult
}