Following an increase in the price of premium organic coffee beans from £8.00 £8.00\,£8.00 to £10.00 £10.00\,£10.00 per pack, the weekly quantity demanded of a complementary milk alternative falls from 1,200 1,200\,1,200 cartons to 1,020 1,020\,1,020 cartons.
What is the cross elasticity of demand (XED) for the milk alternative with respect to the price of organic coffee beans?
−0.60-0.60−0.60
−0.75-0.75−0.75
−1.67-1.67−1.67
+0.60+0.60+0.60
