2.7 Suppose that the following table shows the quantity supplied of UGG boots at five different prices in 2020 and 2021. Quantity Supplied (thousands of pairs of boots) Price 2020 2021 $160 3,000 2,000 170 3,500 2,500 180 4,000 3,000 190 4,500 3,500 200 5,000 4,500 Name two different variables that, if their values were to change, would cause the quantity supplied of UGG boots to change from 2020 to 2021, as indicated in the table