There are altogether six invoices. The first one dated 12 August 2011 is for the month of July 2011. The invoiced amount is Rs.78,399.14p, out of which Rs.71,078.10p is the subscription charges and the rest are taxes; any previous outstanding is shown as nil . In the next invoice (dated 29 August 2011) for the month of August 2011, the previous invoiced amount (Rs.78,399.14p) is shown as the outstanding, to which the subscription charges (Rs.71,078.10p) and taxes are added to arrive at the invoiced amount of Rs.1,56,798.29p. The same pattern continues in the next four invoices, that is to say, the invoiced amount of the last invoice is shown in the next invoice as the previous outstanding to which the subscription charges for the next month is added to come to the invoiced amount. It needs to be noted here that the subscription fees for the months of July, August and September 2011 are charged at the