//do real stuff
var rrp = new Number(listprice*exchangerate);
var ecost = new Number(rrp * (100 - discount ) / 100);
var ecost = new Number(Math.floor(rrp * (100 - discount ))/100);
var GST = new Number(0);
if (gst_on) {
rrp=rrp * (1+f.gstrate.value / 100);
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