578 mln hrn was ? или were? added to the budget...

[kondratenko]

Перевод отчёта по акцизной марке.

[Francis Fanon]

was

[10-4]

WAS поскольу речь о единой сумме или количестве, а не о 578 млн. отдельных предметов.

[Nina79]

were

[timtheint]

Что такое hrn?
Если их миллионы, то все таки were

[pupil]

подозреваю, что это гривны.
согласен с 10-4.
сумма денег, там даже million без s

[10-4]

Много раз уже объяснялось:
Certain nouns and pronouns called collectives may take either plural or singular verbs as predicates, depending on the meaning being conveyed. If the noun or pronoun is viewed collectively as a unit or expresses an amount or measure, its verb is singular; if viewed as separate items, the verb should be plural.

Examples
About 3000 tons of oil was produced. (A quantity weighting, in all, about 3000 tons).
At this place, 10 meters of sandstone is exposed. (A single exposure).
Twenty-two grams of sample was dissolved in 20 ml of acid. (A single measurement)
Four-fifths of the country is satisfied with its health insurance. (One part of a whole)
Before 1940, less than 10% of production was from opencast mines (Again one part of a whole)
Tweny thousand US dollars is less than the real cost is (A single sum of money)
The United States protects its natural resources. (One country)
Three samples were placed on the table. (Three individual samples).

"None" is singular when it means no one or no thing; it is plural when means no persons or no things. "Each" and "every" are usually singular in usage.

A singular verb is common in English with a double subject if it is felt to form a whole:
Checking and stamping the forms is the job of the customs authorities.

http://www.multitran.ru/Download/Technical_Style_Guide.zip