Meaning of "on average up to"

[Bill (Smithville NJ)]

Hi David,

Your question reminds me of a person I worked with a few years ago. During design, we would need to provide the client with estimated construction costs. He would always refer to it as "probable estimated construction costs." We went back and forth on what this meant, so he decided to change it to "approximate probable estimated construction costs". I guess he wanted to make sure that no one could hold him to his estimate.

Bill
Smithville, NJ