aOn versos (left, even-numbered pages), please give the chapter number (do not use the word “Chapter” and the chapter title. The main words in the chapter title (all words except articles, conjunctions and prepositions of fewer than five letters) should begin with a capital letter, just...
sum_rangeis the range of cells that will be added up. It is optional; if you leave it out, Excel will check the criteria against the sum_range. In the two examples above, the first example doesn't need you to provide a sum_range, while the second example does. One of the tricky ...