For each of the following five separate cases, identify the principle of internal control that is violated.

Heather Flat receives all incoming customer cash receipts for her employer and posts the customer payments to their respective accounts.

At Netco Co$.,$ Jeff and Jose alternate lunch hours. Jeff is the petty cash custodian, but if someone needs petty cash when he is at lunch, Jose fills in as custodian.

Nadine Smith posts all patient charges and payments at the Dole Medical Clinic. Each night Nadine backs up the computerized accounting system to a flash drive and stores the flash drive in a locked file at her desk

Barto Sayles prides himself on hiring quality workers who require little supervision. As office manager, Barto gives his employees full discretion over their tasks and for years has seen no reason to review their work.

$[$Select

Desi West's manager has told her to reduce costs. Desi decides that bonding the plant's employees is a waste of money since the company has not experienced any losses due to employee theft. Desi saves the entire amount of the bonding insurance premium by dropping the insurance.