<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script> <script>var jQ = $.noConflict(true);
// version 2
jQ( document ).ready(function() {
// Set Total_Items_Entered and Total_Items_Price to read only
jQ('input[name="Total_Items_Entered"]').prop('readonly', true);
jQ('input[name="Total_Items_Price"]').prop('readonly', true);
// add the class sum to all inputs that we want to add
jQ('input[name^="GB"]').addClass( "sum" );
// This is where the price will be set for each input
// Add the data attribute to hold the price add one for each input
jQ('input[name="GB-HarmonyDecaf-ground"]').data('price',20.25);
jQ('input[name="GB-SunriseBreakfast-ground"]').data('price',25.95);

// on keyup check that the value isn't blank and it's numeric
jQ('input[name^="GB"]').on('keyup', function() {

if (jQ(this).val()!="" || jQ.isNumeric(jQ(this).val())){

// if input value is good fire the function
calc_dues();
}
});

// This is the calculate function
function calc_dues() {

var sum = 0;
var sum_price = 0;
jQ('.sum').each(function(){
if(jQ.isNumeric(this.value)){
sum += parseFloat(this.value);
sum_price += parseFloat(this.value) * parseFloat(jQ(this).data('price'));
jQ('input[name="Total_Items_Entered"]').val(sum);
jQ('input[name="Total_Items_Price"]').val(sum_price.toFixed(2));
}
});

}
});</script>