Fortune Brands Home & Security, Inc.sells Master Lock padlocks. It reported an increase in net sales from $4.9 billion in 2011 to $5.2 billion in 2012, and an increase in gross profit from $1.4 billion in 2011 to $1.6 billion in 2012.

a.	Calculate each years gross profit percentage. (Round your answers to 1 decimal place.)
	Gross Profit Percentage 2012=______% Gross profit Percentage 2011=_______%

b.

Determine whether the change in gross profit was caused by.

A-	an increase in gross profit per sale.
B-	an increase in sales volume.
C-	an increase in gross profit per sale and sales volume.