(a) Dell sold 68,000 monitors in year 2011 and 78,880 monitors in year 2012.
Calculate the quantity relative for year 2012 with 2011 as the base year.
(b) The number of monitors sold by Dell fell by 15% from year 2010 to year 2011.
(i) Express the quantity sold in 2011 as a quantity relative based on year 2010.
(ii) Calculate the number of monitors sold in 2010.
(c) In year 2012 Dell cut the price of its monitors by 5% of the year 2011 price.
Express the income from sales of monitors in 2012 as an index, based on the income from sales of monitors in year 2011 = 100.