function GetCount() {
    var input = Array ('ks1','ks2','ks3','ks4','ks5');
    var sum = 0;

    sum = sum + (parseFloat(document.getElementById(input[0]).value)*2490);
    sum = sum + (parseFloat(document.getElementById(input[1]).value)*4990);
    sum = sum + (parseFloat(document.getElementById(input[2]).value)*2990);
    sum = sum + (parseFloat(document.getElementById(input[3]).value)*1490);
    sum = sum + (parseFloat(document.getElementById(input[4]).value)*4990);

    document.getElementById('sum').value = sum;
}