When checking the sales and account receivable accounts, the auditor would like to confirm the objectives below:

ITEMS	AUDIT OBJECTIVES
I	Sales transactions that are recorded actually occurred
II	The balance presented on account receivables aged trial balance (ATB) for each customer exists on the balance sheet date

Required:

For each of the objectives listed above:

(a) state the name of management assertion from which the audit objective is derived.

(b) advise the auditor of one (1) substantive test they should perform.