Problem 2-2. A corporation with sales of $230,000 (OK it's a small corporation!) paid $11,250 federal tax on taxable income of $55,000. They also had an end-of-year party where they ordered 50 Big Macs at $2.79 each. Given the above what was their: a. Average tax rate (4 points) b. Marginal tax rate (4 points)