250 QUESTION 8 When a local drama theatre company decreased its ticket prices by 20%, the amount of sandwiches sold by a nearby cafe increased from 100 per day to 110 per day. Calculate the cross-price elasticity of demand ( Ec = %Qa / %4Pb ). (Hint: You need to firstly calculate the percentage change in the cafe's sandwhich sales.) Remember for this elasticity the negative or positive sign is very important so you need to put the correct sign in front of your number. (Do not put a space between the sign and number; e.g. not - 2.5 but -2.5). ( Also do not type in calculation working , just type in your final answer as a number ) Click Save and Submit to save and submit. Click Save All Answers to save all answers