They all could be grammatically correct, depending upon what "gimbap" is!
Sra
1. How much is gimbap?
2. How much is a gimbap?
3. How much is two gimbaps?
4. How much are two gimbaps?
5. How much are two rolls of gimbap?
6. I want to eat some gimbap.
7. I want to eat some gimbaps.
8. I want to eat some rolls of gimbap.
(Which expressions are grammatical?)
2 answers
I would say that 2, 4, 5, 7 & 8 are correct.
I have never eaten gimbaps, but I know what they are.
I have never eaten gimbaps, but I know what they are.