A Canny, Domican and Flannery Ltd. has calculated the following Cross Elasticity of Demand values for a number of its products as follows:
Cross Elasticity of Demand between Good A and Good B = + 5
Cross Elasticity of Demand between Good A and Good C = - 0.3
Cross Elasticity of Demand between Good A and Good D = + 0.6
Cross Elasticity of Demand between Good A and Good E = -2.9
What is the significance of the above figures? Include in your answer an explanation of Cross Elasticity of Demand and the formula by which it is measured.