The reason for the grade 1 terminator for the example on page 54 is so that the contractions can be used in the word 'finances'. If you notice in the other two examples, no contractions are used after the numeric indicator.
The preferred method in transcribing things like this is the one that takes less space or makes reading easier. Using no contractions following the numeric indicator in shopping4you takes less space than inserting a terminator after the number and using contractions. In firstname.lastname@example.org, either way (contracted or not) takes the same space. I think this method was chosen because the uncontracted word is easier to read than if a grade 1 terminator was used and then the contractions.
edited by claurent on 3/10/2015