Every missed call is a job somebody else booked.
The lead offer
The phone gets answered after hours. The lead gets a reply in under 90 seconds. The review request goes out after the job without anybody remembering to send it.
Why this one is small and fast
This is the smallest thing I install and the fastest. One recovered job usually covers it.
The honest note
I am not going to tell you a number here. One recovered job is worth what your average job is worth, and you know that number better than I do.