Anthony Began the Year with $96,400 Already Invested in His

Short Answer

Anthony began the year with $96,400 already invested in his Snow 'n Ice retail store. He withdrew $14,200 on March 1 and another $21,800 on April 1. On August 1, he invested $23,700, and on November 1 he contributed another $19,300. What was his average cumulative investment during the year? (Assume that each month has the same length.)