English to Lithuanian Bus/Financial Finance (general)

"The rates according to standard scales of unit costs for certain goods or services may include a component for indirect costs (overheads)."

"Standard scales of unit costs" yra standartiniai vieneto įkainiai. O "rates according to standard scales of unit costs" - "tarifai pagal standartinius vieneto įkainius" ar kažkas panašaus? Tiesiog man tai doesn't make much sense.