The punctuation mark that is not used internally in a sentence is a period (.). Periods are only used when ending a sentence therefore, it should only put at the end. Periods signal that the sentence has already ended and no continuation needed.
The barber. barbers can do their own barber work, so i'm guessing he/she would do it themself
She could argue that you don't need to sell the same thing every year and therefore, we could all try something different this year, not just candy.
She also could argue that candies are not healthy and it's time to distance ourselves from them for now.
The best argument that she could pull off would be, if that was really the case, if fruits were easier and more profitable to sell. By far, if that was the argument, they would all sell fruit easily.