Problem 9-47 [LO 9-7) You are the auditor of Jexel, an auto air-conditioner service and repair company, and you have decided to use the mean-per-unit method to test the existence and gross valuation of recorded accounts receivable. The client's records include 10,500 accounts with a total book value of $1,345,000. You decide to use tolerable misstatement of $192,000, an incorrect acceptance risk of 10 percent, and an incorrect rejection risk of 5.0 percent. Using Excel, you estimated the standard deviation of the population as $35. Use Figure 9-8 to obtain the incorrect acceptance and rejection coefficients. Required: a. Determine the sample size. b. Assume you tested the sample and got the following results: The mean audited value of the accounts sampled was $124. Assuming that the standard deviation of the sample's audited value is also $35, what is the projected misstatement for the population? c. Assuming that the standard deviation of the sample's audited value is $30, what is the projected misstatement for the population? Required A Required B Required C Determine the sample size. (Roundup to the next whole number.) Sample size