Fortune Brands Home & Security, Inc, sells Master Lock padlocks. It reported an increase in net sales from $40 billion in 2014 to $4.6 billion in 2015, and an increase in gross profit from $1.4 billion in 2014 to $16 billion in 2015, 1. Calculate each year's gross profit percentage (Round your answers to 1 decimal place.) 2015 2014 Gross Profit Percentage I 2. Determine whether the change in gross profit represents an increase in gross profit per sale an increase in sales volume. a decrease in gross profit per sale and an increase in sales volume