Untitled

var numberDiv = document.body.querySelector(".numero")= Total Billing;
<head>
<title>Your Total Bill</title>
</head>

<body>
<hi>Billing</hi>
<title><Menu Items></title>;
<script>
numberDiv.innerHTML ="Receipt";
var sum1="MenuItems";
sum1=prompt("Receipt")
var num1="MenuItems";
var num2=(0.07)"tax";
num2=prompt("tax")
var sum2=(num1+num2)#"Total Receipt" + "Tax";
var sum2=numberPrompt(MenuItems+tax_7%);
numberDiv.innerHTML = "Bill w/tax";
var sum2=(num1+num2);#total meal w/tax of 7%;
var num3=(0.05)"gratuity";
var sum3=(sum2+(sum2*num3))#"Total Receipt w/tax" + "Gratuity(5%)";
var sumTotal=(sum1+sum1*num2)+(sum2*0.05);#"Meal plus gratuity of 5%""
numberDiv.innerHTML = "Bill w/tax+gratuity"
var sumTotal=numberPrompt(Your total is w/ tax and tip.)
alert(sum3)
</script>
</body>