Suzie's Sweetshop makes special boxes of Valentine's Day chocolates. Each costs $10 in material and labor and sell for $15. After Valentine's Day, Suzie reduces the price to $9.00 and sells any remaining boxes. Historically, she has sold between 50 and 100 boxes. Determine the optimal number of boxes to make. How would her decision change if she can only sell all remaining boxes at a price of $6?