Advanced Marketing ROI Calculator: What's your Return on Investment ?

This advanced marketing ROI calculator can be used to see the possible results of your next marketing campaign. You can use it on this website or you can put this calculator on your website. You just need to copy the code below into your blog or website.
<script type="text/javascript"> function calculate_roi(form) { var number_pieces; var program_cost; var response_rate; var conversion; var average_spent; if ((form.customers.value == "")||(form.program_costs.value == "")||(form.response_rate.value == "")||(form.conversion_rate.value == "")||(form.average_sale.value == "") ) { alert("Please fill out all fields"); }else { number_pieces = form.customers.value; program_cost = form.program_costs.value; conversion = form.conversion_rate.value; average_spent = form.average_sale.value; response_rate = form.response_rate.value; } respond_nr = number_pieces * (response_rate/100); respsround = Math.round(respond_nr); customers_nr = (respsround * (conversion/100)); customers_round = Math.round(customers_nr); revenue = average_spent * customers_round; total_revenue = (parseInt(revenue*100))/100; roi = ((total_revenue - program_cost)/program_cost)*100; round_roi = (parseInt(roi*100))/100; document.form.total_revenue.value = total_revenue; document.form.roi.value = round_roi; } </script> <font><b>Marketing ROI Calculator</b></font> <FORM NAME="form" ACTION="" METHOD="POST"> <font>Marketing Program Costs:<br> $</font> <INPUT NAME="program_costs" SIZE="9" TYPE="inputbox" VALUE=""><br><br> <font>Amount of People you Reach:</font><br> <INPUT NAME="customers" SIZE="9" TYPE="inputbox" VALUE=""><br><br> <font>Expected Response Rate:</font><br> <INPUT NAME="response_rate" SIZE="4" TYPE="inputbox" VALUE=""><font>%</font><br><br> <font>Conversion Rate:</font><br> <INPUT NAME="conversion_rate" SIZE="4" TYPE="inputbox" VALUE=""><font>%</font><br><br> <font>Average Sale per Customer:<br> $</font> <INPUT NAME="average_sale" SIZE="9" TYPE="inputbox" VALUE=""><br><br> <INPUT type="button" value="Calculate" onClick="calculate_roi(this.form)"> <br> <font><b>Total Revenue: </b><br>$</font> <INPUT NAME="total_revenue" SIZE="9" TYPE="text" VALUE=""><P> <font><b>Return on Investment: </b></font><br> <INPUT NAME="roi" SIZE="9" TYPE="text" VALUE=""><font>%</font><P> </FORM> <div id="content_div"><font size="1">Powered by <a href="http://www.getyourpromotionalproducts.com/" target="_blank">Marketing Products</a></font></div>