I am wondering whether in the following sentences the usage of "over" is optional or it makes the sentences sound more natural or colloquial or something!
Example 1): (Food)
A) The last night dinner was great. I'm so hungry. Is there something left (over) from dinner to eat?
B) Uh, no! There is nothing left (over).
Example 2): (Money)
A) Did you buy all the items within the list I had provided you with David?
A) I gave you 300 dollars. How much money has been left (over)?
B) 130 dollars has been left (over).