Korner Hardware manager Emerson Jones is interested in determining how many nativity scenes to order for the 10-day holiday season. Past experience indicates that demand for these nativity scenes averages eight per day during this 10-day period, with a standard deviation of two per day. Demand is approximately normal. Emerson purchases the nativity scenes for $15 per unit and sells hem for $30 each during the season. After Christmas, they are marked down as sale items for $10 each. Use Appendix A. How many should Emerson order for the coming holiday season? (Round your intermediate calculations to 2 decimal places. Round up your answer to the next whole number.)