Sales Order Due Date

We have to set Due date in Sales order PDF depend upon SO date and term value such as Net7,Net 15,Net 30 etc..

        <#assign term = record.terms?replace("\\D+", "", "r")>
        <#assign date = record.trandate?string["dd"]>
        <#assign date2 = date?number + term?number>
        ${record.trandate?string[date2+"/MM/YYYY"]?date}