This estimator is FREE. After you register, you can use it any number of times. Technowrites has tested the estimator. For a standard model of online help, we guarantee the actual result to be +/-20% of estimated result. For a customized model of help, the estimate may vary by about +/-30%. When you use the estimator, it does not imply that you have to give the work to Technowrites. However, if you want Technowrites to give you a quotation for this work, click the "Technowrites should send me a formal quotation" checkbox on the last page.