11.4A Grant's business makes an operating profit of £16 632 in the year ending 30 April 20X1. One of the deductions in arriving at operating profit was depreciation of £6650.

At 30 April 20X1 the balance sheet showed stock of £26 750, debtors and prepayments of £12 704 and creditors of £11 667. On 30 April 20X0 the corresponding figures were: stock £27 997; debtors and prepayments £11 940; and creditors £9975.

What is the net cash inflow from operating activities to be included in Grant's cash flow statement for the year ending 30 April 20X1 ?

a) £21 107

b) £18 807

c) £22 073

d) £25 457.