Suppose that the following table shows the quantity supplied of UGG boots at five different prices in 2016 and 2017:
___________________________ Quantity Supplied
_____________________ (Thousands of pairs of boots)
Price _____________ 2016 _____________ 2017
$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 2016 to 2017, as indicated in the table?