Fortune Brands Home & Security, Incorporated, sells Master Lock padlocks. It reported an increase in net sales from $5.3 billion in 2017 to $5.5 billion in 2018, and an increase in gross profit from $1.2 billion in 2017 to $1.3 billion in 2018. Required: 1. Calculate each year's gross profit percentage. (Round your answers to 1 decimal place.) 2. The change in gross profit represents: Complete this question by entering your answers in the tabs below. Required 1 Required 2 Calculate each year's gross profit percentage. (Round your answers to 1 decimal place.) 2018 2017 % Gross Profit Percentage % Required 1 Required 2 The change in gross profit represents: an increase in gross profit per sale. an increase in sales volume. an increase in gross profit per sale and an increase in sales volume