9 These adjustments reduced the claim according to the defendant to the amount of $27,223. However, in removing the invoices in respect of deliveries made after 1 November 2007, the defendant also removed payments made after that date. The plaintiff asserts that payments made up to 30 December 2007 were referable to invoices for deliveries prior to 1 November 2007. Again, the defendant, for present purposes, concedes that this is at least sufficiently arguable to warrant deduction of all of those payments from the "admitted amount". That reduces what the defendant contends is the undisputed amount to $4,582. In respect of that residual sum, the plaintiff makes a number of submissions. First, it was submitted that that debt would have been eradicated by the next payment made on the "running account", if there was one. But that would be so only if any next payment was made on the account, and the plaintiff's case is that while the payments made up to 31 December were referable to its account, payments after that date were referable to the account of the new company. In those circumstances, I do not see how payments said to have been made referable to deliveries made after 1 November 2007 could discharge or reduce debts of the plaintiff. Secondly, the plaintiff submits that there is no corresponding invoice for the amount that apparently remains undisputed, notwithstanding that the plaintiff's practice was to pay against invoices, rather than to pay against a statement or balance of account. But while on many occasions, the plaintiff did pay against invoices, and many of its payments represent the accumulation of a number of invoices, this was not invariable and the payments do not always correspond with the amounts of any particular invoices. In any event, whether or not the amount in question of $4,582 can be attributed to any particular invoice is beside the point. If one adds all the undisputed invoices and subtracts all the alleged payments, there is still the balance of that amount outstanding.