Perhaps she could suggest something else? An internship at the college in the fall? Ask at the current internship if there is a special project she could work on during the summer and remotely in the fall? Talk to the other kids and find out what they are doing? Ask if there is an internship available over winter break?
If the employer knows she needs the extra 70 hours, they might have a suggestion. Even if they can find her 20 more hours, that would help her chip away at the requirement.