Final answer:
The correct sentence is: The shoes normally cost 40 dollars; however, we got them on sale.
Step-by-step explanation:
The correct sentence is: The shoes normally cost 40 dollars; however, we got them on sale.
The semicolon (;) is used to connect two independent clauses that are closely related in meaning. In this case, the semicolon is used to connect the independent clauses 'The shoes normally cost 40 dollars' and 'we got them on sale.' The word 'however' serves as a transitional adverb and should be followed by a comma (,) to separate it from the rest of the sentence.
Example: I love swimming; however, I don't have enough time to go to the pool.
Learn more about Punctuation in English sentences