From the following information, prepare a Total Drs, Account as on 31st Dec., 1998: Debtors on 1-1-98 98,750 Bills Receivable received 42,500 Sales 3,64,000 Cash paid 1,000 Cash received 3,21,000 Discount allowed 12,500 Returns 1,800 Transfer to Bought Ledger 850 Bills dishonoured 7,500 The balances extracted from the Sales Ledger on 31-12-98 amounted to $ 93,000 and the company's Trial balance showed of $ 400. What conclusion would you draw from this difference