Why isn't down payment included in a total cost of project?

[Kikko Maeyama]

A book about rental property investing I am reading says that a total cost of project = purchase price + closing costs + pre-rent holding costs + repair costs. Why isn't a down payment included here?

The scenario presented is as follows:

Purchase price: 75,000
Closing  costs: 2,500
Pre-rent holding costs: 1,200
Repairs: 17,250
Total cost of project = 96,950

Mortgage: 60,000 (80%)
Down payment: 15,000 (20%)

I thought that a total cost of project was and a total initial investment are the same thing. Am I wrong?