Morales Incorporated sells padlocks. It reported an increase in net sales from $4.4 billion in 2017 to $4.7 billion in 2018 , and an increase in gross profit from \$1.4 billion in 2017 to \$1.6 billion in 2018. 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. Calculate each year's gross profit percentage. (Round your answers to 1 decimal place.) 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