Answer:
Incremental Analysis for special order
units                                  10,000
offer price                              $290,000
Variable cost:
Cost of goods sold($22.5 *10,000) Â Â 225,000
Selling and Administrative expenses
($2.05*10,000) Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 20,500
shipping cost (0.77*10,000) Â Â Â Â Â Â Â Â Â 7,700 Â Â Â (253,200)
Additional contribution                       36,800
Explanation:
variable cost goods sold per unit  =  ( 3,633,000 - 960,000)/118800 = $22.5
Variable selling and admin expense per unit = ( 517,540 - 274,000)/118800 Â Â Â Â Â Â Â Â Â
                                     = $ 2.05