M-1 and M-2 are two of the most well-known measures of the United States money supply. We need to find M-1. If M-2 is $12,500 bb (these numbers are all in rounded billions of dollars, or "bb"), Savings Deposits are $7,078 bb, Small CDs (less than $100k) are $687 bb, Retail Money Funds are $715 bb, and Travelers Checks are $4 bb, then what is the amount for M-1?