$$75\div7=10R5$$ 
Cassandra is helping her mother to pack $$75$$ cupcakes. The boxes that her mother prepares can only fit $$7$$ cupcakes. She must ensure the box is full before she can use the next box. How many boxes she can fill up? 
Options:
* $$1$$ 
* $$5$$ 
* $$10$$ 
* $$68$$ 
* $$70$$ 