javascript - jQuery adding numbers not correctly sum with decimals

I have a js file which calculate all totals when a user click, this will sum up all clicked rows but if the number contains decimal, would not add correctly, instead always put 00 on decimals

function calculateRevenue(){
        var sum = 0;

        $("input#check_count_revenue[type=checkbox]:checked").each(function() {
            sum += parseInt($(this).attr("data-revenuecount"));
        });

        $("#revenue_count_totals").html(sum.toFixed(2)).digits();
    };

Then calling the function like this

table.on("change","input#check_count_revenue", function() {
        $(this).closest("td").addClass("checked_revenue");
        calculateRevenue();
        if ($(this).prop("checked") === false)   
        $(this).closest("td").removeClass("checked_revenue");
    });

If the row contains the following

 12.00
 13.00

That would correctly sum 25.00

But

 12.00
 13.01

Still got 25.00 instead of 25.01

Any ideas? I already tried parseFloat in place of parseInt, does not resolve