Fast growing pizza delivery firm Domino's Pizza will deliver an extra topping of profits after a strong finish to 2010. System sales for the 13 week period to 26 December increased by 17.8% to £132.5m from £112.4m in the corresponding period of 2009.That took system sales for the 52 weeks ended 26 December 2010 to £485.3m, a 19.2% increase on 2009's £407.0m). Like-for-like (LFL) sales in 553 mature stores grew by 10.3% for the final quarter, compared to a LFL year-on-year period gain of 8.6% in 501 mature stores in the corresponding period of 2009.Like-for-like sales growth for the year was 11.9%, versus 8.4% the year before. The company now operates a total of 665 stores, up from 608 at Christmas 2009."We have again finished the year with a like-for-like sales performance that is ahead of expectations and, together with the improvements in our operational gearing, I am delighted to announce that the company will deliver full year 2010 profits ahead of current City expectations," said chief executive, Chris Moore.The company continues to see an increasing number of orders placed electronically. E-commerce sales for the year in the UK and Republic of Ireland were £128.0m (2009: £78.5m), an increase of 63.0% (2009: 40.4%), and now account for 35.8% of UK delivered sales (2009: 27.8%). "With the impending launch of an ordering app for android phones, these figures are expected to continue to rise," the company said.