Please solve the following simulation problem using Excel; provide screenshots for formulas:

B&C clothing stores is trying to determine how many Karen Michelle dresses to order for the spring season. Demand for the dresses is assumed to follow a normal distribution with a mean of $400$ and standard deviation of $100.$ The contract between Karen Michelle and B&C works as follows. At the beginning of the season, B&C reserves X units of capacity. B&C must take delivery for at least $0\mathrm{.}8$X dresses and can, if desired, take delivery on up to X dresses. Each dress sells for $$160$ and Karen Michelle charges $$50$ per dress. If B&C does not take delivery on all X dresses, it owns Karen Michelle a $$5$ penalty for each unit of reserved capacity that is unused. For example, if B&C orders $450$ dresses and demand is for $400$ dresses, B&C will receive $400$ dresses and owe Karen Michelle $400($$$50)+50($$$5).$ How many units of capacity should B&C reserve to maximize its expected profits? Use trial values of $400$ to $600$ dresses in increments of $50.$