Suppose that the following table shows the quantity demanded of UGG boots at five different prices in 2016 and 2017:
______________________________ Quantity Demanded
________________________ (Thousands of pairs of boots)
Price ________________ 2016 ________________ 2017
$160 ......................... 5,000 ..................... 4,000
170 ........................... 4,500 ..................... 3,500
180 ........................... 4,000 ..................... 3,000
190 ........................... 3,500 ..................... 2,500
200 ........................... 3,000 ..................... 2,000
Name two different variables that if their values were to change would cause the quantity demanded of UGG boots to change from 2016 to 2017, as indicated in the table?