Billing for goods sold or services provided to clients
Recording receipts from customers
Verifying and recording invoices received from suppliers
Paying suppliers
Processing employees' pay and the related governmental reports
Monitoring individual accounts receivable
Recording depreciation and other adjusting entries
Providing financial reports
 
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The fee is per month. 10% discount for 3 months, 20% for 6 months and 30% discount for 12 months.