Which of the following statements is NOT correct?

a) the sales budget is the starting point in prearing the master budget.

b) the sales budget is constructed by multiplying the expected sales in unit by the sales price.

c) the sales budget generally is accompanied by a computation of expected cash receipts for the forthcoming budget period.

d) the cash budget must be prepared prior to the sales budget because managers want to know expected cash collections on sales made to customers in prior periods before projecting sales for the current period.

Provide answer and explain.