After the U.S. Congress passed temporary tax cuts in 2010, U.S. taxpayers who earned up to $50,000 per year had a lower tax rate. On average, these taxpayers retained 2% more of their income than before the cuts. The 2010 law also gave the same persons a separate $850 credit on their federal tax return. (a) How much extra money did a typical person earning $50,000 receive due to the federal tax cuts