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If the price of milk increases by 20% and the quantity of demand for milk decreases by 4%, answer: Find the price elasticity of demand. Is the demand elastic, inelastic, or unit? The quantity demanded by product A increases 8% when the price of product B increases 16% and the other variables remain the same. Calculate the cross elasticity of demand. Products A and B, are they complementary or substitutes? A company increases the price of its product from $ 210 to $ 240 per unit and keeps 30,500 units of this product in stock each month. I need the formulas and a lot of help