Why ask for additional expenses due to the number of people travelling up from 5 people as 8 people and backed up in case there are additional expenses which the OEC will try to spend, save, and covers the most
The reason for the added expense. Because the number of travelers increased from 5 to 8 people and is backed up in case there are additional costs that OEC will try to spend the most economical and comprehensive.
The cause for the added expense Because there were people increased from 5 people, as 8 people and backup in case of cost more, which OEC will cost saving and covers most