Answer:
a. 7,900
b. 10,100
Step-by-step explanation:
As for the provided information,
We know at break even point taxes shall be = 0 as there are no profits and no losses.
a. At break even: =

Fixed Cost = $308,100
Contribution per unit = Selling price - Variable cost = $79 - $40 = $39
Therefore, break even units =

b. In case the company wants a profit of $51,480 after tax @ 40% then,
Earnings before taxes =
= $85,800
Therefore, number of units =

=
= 10,100