Suppose that the price of product A decreases from $27 to $14 and, as a result, the quantity traded of A increases from 175 to 210, the quantity traded of B increases from 65 to 100 and the quantity traded of product C falls from 505 to 400.
1) What is the absolute value of the price elasticity of demand of product A?
2) What is the cross-price elasticity of demand for good B with respect to the price of good A?
3) What is the cross-price elasticity of demand for good C with respect to the price of good A?