I assumed you typo 821 by $21 per unit, then the answer will be
1- financial disadvantage of accepting the special order is loss of $60,000
2- a minimum selling price for these units should be $14.00
Step-by-step explanation:
Loss of $60,000 = 15,000 x (14,000 – (5.1+3.8+1+4.2+1.5+2.4))
a minimum selling price for these units is $14.00 per unit because it’s the price the company can earn if accept a special order, though lower than cost of producing and selling at $18.00