Lang,
I was not aware of that book, but your image lead me to this version from 1952:
https://armyvehiclemarking.com/wp-co...compressed.pdf
The “Dodge Trucks built for the Canadian Government” can be found on page 9-1.
My calculations indicate a total of 28854 T-222 (D15) built.
Upon review, I realize that my calculation excluded one vehicle in each block of serial numbers. The correct figure should be 28866.
Note: If someone has the ability to add page 9-1 as an image I believe it will be a useful reference in the future.