Final answer:
The use of a voucher system with a petty cash fund is to ensure effective a) expense tracking. It provides a transparent record of all petty cash transactions, improving financial control and accountability.
Step-by-step explanation:
The purpose of using a voucher system with the petty cash fund is primarily for expense tracking. A voucher system helps ensure that even small cash transactions are appropriately documented, reviewed, and approved. Whenever an employee uses petty cash, they must fill out a voucher documenting the expense, which includes details like the amount of cash used, the date, the nature of the expense, and who is responsible for the transaction. This voucher then becomes a part of the financial records and provides a paper trail for auditors, accountants, and managers to follow. This process ensures transparent and efficient management of the petty cash fund by providing clear evidence for all cash movements. Unlike options b, c, and d, which relate to cash withdrawals, employee bonuses, and bill payments respectively, the use of vouchers is not directly related to these activities but serves to provide necessary fiscal control and accountability within an organization.