This worksheet does not predict results. It shows how many additional inquiries and jobs would be needed for the six-month engagement to make commercial sense under your assumptions.
Use contribution margin if that better reflects what remains after delivering an additional job.
At the job value and margin entered, this is the approximate number of additional jobs needed to cover the engagement.
The calculation assumes every additional inquiry is equally qualified, the close rate holds, the work can be delivered, and margin remains stable. Real performance will vary.
The most useful question is not “Can marketing produce a big number?” It is “How many additional good jobs would make this system worthwhile, and does the business have capacity to deliver them?”
Discuss the real operating numbers