An organization's trial balance at the end of the month was out of agreement, with the debit side totaling £500 less than the credit side. A suspense account was opened for this amount.

During the next month, the following errors were discovered:

(a) The purchase returns day book had been under cast by £50

(b) Rent payable of £400 had been credited to the rent receivable account

(c) A non-current asset, with a net book value of £700 had been disposed of at a loss of £80; all entries had been correctly recorded except that the sale proceeds had been omitted from the disposals account.

Following the correction of these errors, the balance on the suspense account would be.