Over                                But Not Over                     Tax Due$0                                     $15000                             2.5% of taxable income$15000                              $30000                             $375 plus 6.3% of excess over $15000$30000                                                                       $1320 plus 6.4% of excess over $30000 A company is planning to manufacture snowboards.  The fixed costs are $101 per day and the total costs are $7,305 per daily output of 22 boards.  What is the average costs per board tend to as production increases?