Answer:
$6.90
Explanation:
Apparently the cost function for the Oyster is ...
c(n) = 90,000 +5.40n
Then the cost for 60,000 units is ...
c(60,000) = 90,000 +5.40·60,000 = 414,000
In order to break even, Sackville Plastics must sell these for ...
$414,000/(60,000 units) = $6.90/unit