Answer:
$0.40 ; $1 and $71.43%
Step-by-step explanation:
The computation is shown below:
Excess cost is
= Unit cost - Salvage Value
= $1 - $0.60
= $0.40
The shortage cost is
= Selling value - unit cost
= $2 - $1
= $1
And, the optimal service level is
= Shortage cost ÷ (Shortage cost + excess cost)
= $1 ÷ $1.60
= 71.43%
Basically we applied the above formulas