% based Calculation of excel sheet to track our mailers

We are trying to keep very specific % on our mailers.. we need to be able to track all the info below , so either we would like someone to create a software that we can use or maybe even an excel sheet to track it..

1.) I need a cost per lead basis.. meaning how much does it cost to to get a lead
2.) % of leads we receive to mailers we send , So if we send 100 mailers and receive 10 calls thats 10%
3.) % of returned mail to the amount of mailers we send. So if we send 100 mailers and get back 1 thats 1% returned mail
4.) Deal to mailers % how many mailers do we have to send to get a deal
5.) Calls to deals = how many calls do we have to receive to get a deal
6.) Skip trace to deal % Meaning how many skip traces do we have to do to find a deal .. what is the % of that ??

Regards

All of the calculations are trivial once you have the information about the leads, who, where, when, and thoe associated costs, but you say nothing about that so I don't see how we can progress to those formulae,