In 2013, Macy's reported cost of goods sold of $17.6 billion, ending inventory for 2013 of $9 billion, and ending inventory for the previous year (2012) of $8.6 billion.

Required:

If the cost of inventory purchases was $18.5 billion, what was the cost of shrinkage during 2013? (Enter your answer in billions rounded to 1 decimal place.)