The number fields I am using only the one field is returning the error.

$(document).ready(function () {
    $('.cf-collection-block').on('blur', 'input', sumtotal);
    $('.subtotal').on('blur', 'input', sumtotal)
    $('.quantity').on('blur', 'input', sumtotal);
    function sumtotal() {
        var sum = 0;
        $('.cf-collection-block ul').each(function () {
            var s = 0;
            s = (parseNumber($(this).find('.price input').val()) *1.085* parseNumber($(this).find('.quantity input').val()));
            $(this).find('.subtotal input').val(s.toFixed(2));
            sum += s;
            
        });
        $('.total input').val(sum.toFixed(2));
    }
    function parseNumber(n) {
        var f = parseFloat(n); //Convert to float number.
        return isNaN(f) ? 0 : f; //treat invalid input as 0;
    }
});

As far as the calculations go, it's working perfectly.  I am just not sure why it's wanting an Integer while the Quantity seems to be fine.