function UpdateCost() {
	
	
form.monthsales.value = 	parseInt(form.valueonlinesales.value)  * parseInt(form.numberonlinesales.value) * 30;
form.yearsales.value = 12 * form.monthsales.value;


form.monthtelephoneorders.value = 	parseInt(form.valuetelephoneorders.value)  * parseInt(form.numbertelephoneorders.value) * 30;
form.yeartelephoneorders.value = 12 * form.monthtelephoneorders.value;


form.montheventorders.value = 	parseInt(form.valueeventorders.value)  * parseInt(form.numbereventorders.value);
form.yeareventorders.value = 12 * form.montheventorders.value;



form.monthgrossincome.value = Number(form.montheventorders.value) + Number(form.monthtelephoneorders.value) + Number(form.monthsales.value);
form.yeargrossincome.value = Number(form.yeareventorders.value) + Number(form.yeartelephoneorders.value) + Number(form.yearsales.value);

form.grossrevenue.value = form.yeargrossincome.value;


var Setup =parseInt(form.setupcost.options[form.setupcost.selectedIndex].value);

form.yearhosting.value = 12 * parseInt(form.monthlywebhosting.value);
form.yearadcost.value = 12 * parseInt(form.monthadcost.value);



form.monthtransaction.value =  parseInt(form.valuetransactionfee.value) * (parseInt(form.numberonlinesales.value) * 30);

form.yeartransaction.value = form.monthtransaction.value * 12;

form.monthcost.value = Number(form.monthlywebhosting.value) + Number(form.monthadcost.value) + Number(form.monthtransaction.value);

var Year = Setup + (form.monthcost.value * 12);

var DEC = roundNumber(Year,2);

form.yearcost.value = DEC;

form.costs.value = DEC;

form.netprofit.value = Number(form.grossrevenue.value) - DEC;


}


function roundNumber(num, dec) {
	var result = Math.round(num*Math.pow(10,dec))/Math.pow(10,dec);
	return result;
}