After a contract is signed with a customer, the sales manager prepares a prenumb that indicates the materials needed for the work at the repair site Based on the purchase requisition fo ered purchase requisition form Document procedures Establish responsibility ndependently verify Segregate duties Establish responsibility Independently verify rm, the materials/crew manager prepares and sends a prenumbered b. purchase order to suppliers of materials, advising them of the specific materials needed and the repair site to which they should be delivered c. The materials/crew manager is the only employee authorized to order goods Upon receiving a supplier's invoice, the accountant compares it to terms indicated on the purchase order, noting in particular the prices charged and quantities ordered If these documents are in agreement, the accountant prepares a prenumbered check, stamps the invoice paid," e. and prepares a journal entry to record the payment. The journal entry explanation references the sequential number on the purchase order HRC's owner prepares a monthly bank reconciliation and reviews checks returned with the bank statement to ensure they have been issued to valid suppliers . After several months, HRC's materials/crew manager is arrested for having $20,000 of materials delivered to his home but charged to the company. Identify the internal control weakness that allowed this theft to occur There was no way to independently verify that amounts charged by suppliers were for goods that had been delivered to authorized work sites Purchase orders were not prepared on the basis of prenumbered requisition forms. A copy of the purchase order was not sent to the repair site OThe materials/crew manager's order should have been verified by the department head