PWR script

$('td:contains("2.0")').parent().remove();
$('td:contains("k.cz.")').parent().remove();
var sumOfEcts = 0;
var sumOfNotes = 0;
$('td[title="ocena"]').each(function(){
    sumOfNotes += parseFloat($(this).text()) * parseFloat($(this).next().next().text());
    sumOfEcts += parseFloat($(this).next().next().text());
    
});
console.log('twoja średnia to:', sumOfNotes/sumOfEcts);