Please explain how these answers came out. And Let me know what's the solution.

Math 2000 Applied Calculus Review The following table shows the sales, in thousands, since a new game was brought to the market. 8. Using the point of diminishing returns, predict the total possible sales, in thousands, of this game. month 2 4 6 8 10 12 14 sales/month 0 2.3 5.5 9.6 10 8 6.1 4.3 total approx 4(2.3+9.6)-47.6 (an estimate) 47.6+2 or 96000 (different example) the other form of the problem begins with the table below month 0 2 4 6 8 10 12 14 total sales 0 4.6 15.6 34.8 54.8 70.8 93 101.6 sales/2 month 4.6 11 19.2 20 16 12.2 8.6 so 54.8 2 or 110,000