Answer:
The unit price should be $25.6
Explanation:
Net realization value = selling price - selling cost
                  = $42 - $8
                  = $34
Profit margin = 20% of selling price
           = 0.2 × $42
           = $8.4
NRV - profit margin:
= $34 Â - $8.4
= $25.6
Since we don't have replacement cost in the question. Hence, the market value is lower of (NRV, NRV-Profit) = $25.6
The unit price should be $25.6