Specify audit objectives and tests for the Existence assertion for Inventory and Accounts Payable.

I have this chart with the files I have available to come up with tests.

\begin{tabular}{|l|} \hline Purchase Order \\ \hline PO Num PK \\ Product PK \\ Date \\ Quantity \\ Cost \\ Ext Cost \\ Vendor Num FK \\ RR Num \\ \hline \end{tabular} \begin{tabular}{|l|} \hline Inventory \\ \hline Product NumPK \\ Description \\ Unit Cost \\ Valuation Date \\ Quan(tity) on Hand \\ Unit Cost \\ Value at Cost \\ Sales Price \\ Market Value \\ \hline \end{tabular} \begin{tabular}{|l|} \hline Receiving Report \\ \hline RR Num PK \\ Product PK, FK \\ PO Num FK \\ Vendor Num FK \\ Rec Date \\ Quantity \\ \hline \end{tabular} Voucher Payable Voucher Num PK \begin{tabular}{|l|} \hline Vendor \\ \hline Vendor NumpK \\ Name \\ Street \\ City \\ State \\ Zip \\ \hline \end{tabular} PO Num FK Vendor Num FK Sup Invoice Full Amount Disc Amnt Due Date \begin{tabular}{|l|} \hline Chk Register \\ \hline Chk Num PK \\ Voucher Num FK \\ Vendor Num FK \\ Chk Amt \\ Pay Date \\ \hline \end{tabular}