This is very useful information that you shared @D.E. Eliot I'm actually compiling a similar list of expenses an author should expect if they are self publishing their book. This is in conjunction with a workshop I gave this past week on self publishing. You can review what I've started here: https://aalbc.com/nbwc/
Now every manuscript it different, so the production costs will be different as well. For example I would also caution writers against editors that price based upon a manuscript's length. Again every book is different; some books need a less work than others -- the pricing should be a function of the effort involved not the simply the length.
Is #10 and #12 for promotional copies for booksellers, reviewers, etc?
Yeah 50% of ones budget allocated to marketing sounds about right. Though the cost of this over time if you hire a publicist and purchase advertising regularly and crun into integer multiples of the production costs.
It is interesting that you were a late reader and are now a published author -- congrats. I know a Brother who was functionally illiterate, in college (a football player). He is now a successful novelist published by a major house.