Taylor is engaged to audit Rex Wholesaling for the year ended December 31, 1999. Taylor considered internal controls over purchasing, receiving, trade accounts payable, and cash disbursement and has decided not to proceed with tests of controls. Based on analytical procedures, Taylor believes that trade accounts payable may be understated at December 31. Taylor requested and obtained from management a client prepared trade accounts payable spreadsheet listing the amount owed each vendor.

Required: 

Discuss additional substantive audit procedures that Taylor should apply to trade accounts payable.