10 Sep 2009, created an invoice (invoice number 1001) to Customer ABC Pte Ltd for $1,000.00. 15 Sep 2009, ABC Pte Ltd sends you a cheque of $950.00 for the payment of invoice 1001. Customer deducted the $50.00 off as a discount you had agreed earlier. However, your Accounts Assistant had entered it as $1,000.00 […]