Try this:
var mycurrency = ['0.80€', '0.60€', '0.50€', '0.506€'], sum = 0;
$.each(mycurrency, function(i, obj){
var myval = parseFloat(obj.replace('€', '')).toFixed(2);
console.log('--->', myval);
sum += parseFloat(myval);
});
console.log('--->', sum, '(Sum)');
---> 0.80
---> 0.60
---> 0.50
---> 0.51
---> 2.41 (Sum)