your uncle bob, a cpa, has recently started auditing and he wants your advice on some tests of sales transactions he is conducting. bob selected a haphazard sample of 15 sales with a total book value of $75,000. in his sample, he found a total of $500 in net overstatement errors. the total sales balance per book is $10,000,000. overall materiality for the engagement is $300,000. tolerable misstatement for sales is $70,000. if the sample results indicate that bob's best estimate of total misstatement in sales is $35,000, can bob safely conclude that no additional work is needed in this area? include in your answer a clear discussion of how sample results are compared to tolerable misstatement.