A B D E F Record the return of vehicles by the customer at $137,000. Note: Enter debits before credits. Transaction General Journal Credit Debit 137,000 5 Refund Liability Cash 137,000 Luxottica Group, the Italian company that sells Ray Ban and Oakley sunglasses, reported net sales of 8.8 billion in 2015 and 76 billion in 2014. Gross profit increased from 51 billion in 2014 to 6.0 billion in 2015 1. Calculate the gross profit percentage for each year. (Round your answers to 1 decimal place.) 2015 2014 % Gross Profit % 2. Was the increase in gross profit caused by an increase in gross profit per sale. O an increase in sales volume an increase in gross profit per sale and an increase in sales volume