Net sales per square foot of Zumiez worldwide from 2010 to 2020

Net sales per square foot represents net sales, including ecommerce sales, for the period divided by the average square footage of stores open during the period. For purposes of this calculation, the average square footage of stores open during the period is equal to the sum of the total square footage of the stores open as of the end of each month during the fiscal year divided by the number of months in the fiscal year.