Answer:
differential revenue = $7
so correct option is a. $7
Explanation:
given data
Product A costs= $6
contribution margin = $3
Product B costs = $12
contribution margin = $4
to find out
differential revenue
solution
first we get here selling price for product A and B
selling price for product A = Product A costs + contribution margin
selling price for product A = $6 +$3
selling price for product A = $9
and
selling price for product B = Product A costs + contribution margin
selling price for product B = $12 + $4
selling price for product B = $16
so
differential revenue will be
differential revenue = selling price for product B - selling price for product A
differential revenue = $16 - $9
differential revenue = $7
so correct option is a. $7