'That is two scoops'. Is this correct?

I was buying some ice creams today
And the girl at the counter told me, that is your two scoops.

I didn't dare to ask her if what she said was grammatically correct, so I decided to do it here!

Is it correct to say 'That is your two scoops,'?

I believe it should be, based on the little knowledge of grammar I have, 'These are your two scoops,', but I also think the former simply sounds more natural and like something a native would say.

Also, one more thing; 'Here is your order, which ____ a banana, an apple and a pear.
If you had to put in one of the two words 'is' and 'are', what would you put in there?

Thanks in advance.