Self-test You are presented with the following information for Calculator Ltd for the year ended 31 December 2009.

Balance sheet data 2008 2009 Fixed assets 9,650 9,530 Current assets including debtors 11,470 12,424 Debtors included above 4,800 4,200 Creditors: amounts due within one year 4,720 4,954 Trade creditors included above 4,420 4,562 Creditors: amounts due in more than one year 6,000 1,200 Ordinary share capital of 50p each 5,700 6,028 Reserves 4,700 9,772 Profit and loss data Turnover 44,800 52,620 Opening stock 4,820 6,000 Purchases 37,080 42,840 Closing stock 6,000 7,400 Cost of goods sold 35,900 41,440 Gross profit 8,900 11,180 Interest payable 480 130 Net profit after interest but before tax 4,345 5,464 Net profit after tax 4,224 5,312 Dividends proposed 180 240 The following notes apply to the information above and must be taken into account in your calculations:
(i) All purchases and sales are made on credit.
(ii) The market value of the 50p ordinary shares of Calculator Ltd at the end of each year was £2.50 and £3.50 respectively.
(iii) The issue of equity shares during the year ended 31 December 2009 occurred at the beginning of that year.
You are required to calculate (to the nearest one decimal place) the following ratios for the years 2008 and 2009:

(a) Gross profit margin.

(b) Net profit margin.

(c) Return on capital employed.