Questions & Answers about Tarifa i iznos su na računu.
Because together they form a compound subject: tarifa i iznos = the tariff/rate and the amount.
Even though each noun is singular by itself, the whole subject is plural, so Serbian uses the plural form of to be:
- je = is
- su = are
So:
- Tarifa je na računu. = The tariff/rate is on the bill.
- Iznos je na računu. = The amount is on the bill.
- Tarifa i iznos su na računu. = The tariff/rate and the amount are on the bill.
They are in the nominative case, because they are the subject of the sentence.
The subject is the thing that is somewhere:
- tarifa = the tariff/rate
- iznos = the amount
Since they are the ones being talked about, they stay in nominative:
- tarifa
- iznos
Because after na when it means location (on, , ), Serbian uses the .