Answer: $60
Step-by-step explanation:
The optimal price for a monopoly firm is expressed by;
Price = Marginal Cost * ( Own Price Elasticity/ (1 + Own Price Elasticity))
Price = 10 * ( -1.2 /( 1 - 1.2)
Price = 10 * (-1.2/-0.2)
Price = 10 * 6
Price = $60