Javascript算式練習 求修正

YPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">

function showans(){
var s1 = document.getElementById('s1').value;
var anss1 = document.getElementById('anss1');
var anss2 = document.getElementById('anss2');
anss1.value = (s1 * 2) + (50 * 440);
anss2.value = (anss1.value)/200;
}

function showans(){
var s2 = document.getElementById('s2').value;
var anss3 = document.getElementById('anss3');
var anss4 = document.getElementById('anss4');
anss3.value = (s2 * 1) + (15 * 440);
anss4.value = (anss3.value)/200;
}

function showans(){
var s3 = document.getElementById('s3').value;
var anss5 = document.getElementById('anss5');
var anss6 = document.getElementById('anss6');
anss5.value = (s3 * 1) + (40 * 275);
anss6.value = (anss5.value)/350;
}