Disaster plc's trial balance shows trade receivables of £50,000. However, no adjustment has been made for the following items. 1 £3,250 from J Crisis & Sons who have gone into liquidation. The amount is considered irrecoverable. 2 An increase in the allowance for receivables of £2,000. 3 Cash received from P Chaos of £2,500 which had previously been written off. What is the revised trade receivables account balance after posting the above adjustments?