Dear concerned authority, While revising the topic subject-verb agreement, a statement 'When two singular subjects are joined by 'and, and - English - Subject-Verb Agreement

Question

Dear concerned authority,
While revising the topic subject-verb agreement, a statement 'When
two singular subjects are joined by 'and, and there is also use of
words like 'each' and'every', the verb that follows is singular
However, in the examples given, the sentence was 'Each orange and
each apple costs ten rupees' 'Costs' was used while it was supposed
to be singular I kindly request you to clarify on this matter
Regards

Maitreyi Haldar · Accepted Answer

"costs" here is not the plural of cost but the possessive form of
the noun It indicates separate cost of the two nouns (apple and
orange) joined together in the sentence