Matofali imitations company have predicted that their turnover for next year will be TZS $450,000$ and that their costs will be TZS $400,000.$ They thus expect to make a profit of TZS $50,000$ and are quit happy. As you talk to the partners, however you realize that there are a whole host of factors which will affect both the turnover and costs figures. You persuade them to look at the problem as if each figure were a variable and suggest that they treat them as having normal distributions. Given the nature of the business, you decide to assume a standard deviation of TZS $25,000$ for each distribution. What is the probability that the partnership makes a profit?