Assuming the cookbook is 200 pages at 7 x 10 inches (which is larger than I had previously planned) then for an order of 100, on the "pro plan" (which seems a worthwhile investment) each book will cost me $3.25, for a total of $325. This is with the author's discount. For 300 pages, $4.45 and $445, respectively. I imagine the pages will fall in that range, somewhere. I should have a more exact count soon. The calculator is here, under the "buying copies" tab.
The pro plan costs $39 the first year, and $5 each subsequent year. The pro plan would set the book up to potentially be sold in bookstores.