Which of the following statements is not correct?

(a) cash is important to the audit process because of its vulnerability to misappropriation, despite the fact that the balance at the balance sheet date may be immaterial.
(b) payroll cash account balances kept on an imprest basis are more easily controlled than others not so kept.
(c) confirmation of cash should only be performed as of the balance statement date because the auditor expresses an opinion as of that date.
(d) reviewing interbank transfers is important to the auditor because of the possibility that the client may be engaged in kiting.

$527.7.if the following was the question  $527.7 is the answer.students who are trying to raise funds have an agreement with a local pizza chain. the chain has agreed to sell them pizzas at a discount, which the students can then resell to families in the local community for a profit. it is expected that of the 500 families in the community, at most 70% will buy pizza. based on a survey of their personal preferences, the students believe that they should order no more than 120 cheese pizzas, no more than 150 pepperoni pizzas, and no more than 100 vegetarian pizzas. they also want to make sure that at least 20% of the total pizzas are cheese and at least 50% of the pizzas are pepperoni. they make a profit of $1.45, $1.75, and $1.98, respectively, for each cheese, pepperoni, and vegetarian pizza they resell. how many pizzas of each type should they buy?