Hello!

I am trying to figure out the acid test ratio for Amazon.com for 2015.

I cannot for the life of me, choose the right numbers off the Security 10-K.

Here is the formula I am using:

cash+short-term investments+net current receivables

divided by current liabilities.

Current Liabilities are: 33,899 in millions. I think cash is "cash and equivalents" but I am unsure as to whether or not to use the ending balance.

Help is appreciated. Thank you.

Here is the Sec 10-K link:

https://www.sec.gov/Archives/edgar/data/1018724/000101872416000172/amzn-20151231x10k.htm#sDE44A2B31082AE97A401ABB24E2245F0