function compute(form)
{
var age = parseFloat(form.SpouseAge.value);
var a = parseFloat(form.LivingExpenses.value, 10) * 12 * (65 - age) + parseFloat(form.LivingExpenses.value, 10) * 0.8 * 12 * 30;
var b = parseFloat(form.FuneralExpenses.value, 10) + parseFloat(form.EstateExpenses.value, 10) + parseFloat(form.Taxes.value, 10);

var c = parseFloat(form.LoanExpenses.value, 10) + parseFloat(form.CollegeExpenses.value, 10) + parseFloat(form.OtherExpenses.value, 10);

var d = (parseFloat(form.SpousalIncome.value, 10) + parseFloat(form.OtherIncome.value, 10)) * (65 - age);
var e = parseFloat(form.SocialSecurity.value, 10) * parseFloat(form.YearsOfSS.value) +
parseFloat(form.Existing.value, 10); 

var te = a + b + c;
var ti = d + e;
form.Total.value = te - ti; 
}