Use correct spelling, punctuation, capitalization, letter form and paragraphing. When you have finished, read your letter through and rewrite it if you are not satisfied with any part of it. When should you rewrite your letter?

Which sentence is punctuated correctly? the shoes normally cost 40 dollars, however; we got them on sale. the shoes normally cost 40 dollars however we got them on sale. the shoes normally cost 40 dollars, however, we got them on sale. the shoes normally cost 40 dollars; however, we got them on sale.