Analyzing and Computing Issue Price, Treasury Stock Cost, and Shares Outstanding Following is the stockholders' equity section of the December 31, Pillar Inc. balance sheet. a. How many shares of Pillar common stock are outstanding at year-end? b. What does the phrase "at paid-in amount" in the common stock account mean? c. At what average cost has Pillar repurchased its stock as of year-end? Note: Round your answers to two decimal places (for example, enter 67.49 for 67.48555 ). shares outstanding $