Vaughn inc makes unfinished bookcases that it selts for $58. Production cosits are $37 variable and $10 fixed. Because it has unused capacity, Vaughn is considering finishing the bookcases and selling them for $72. Variable finishing costs are expected to be 58 per unit with no increase in fixed costs. Prepare an analysis on a per-unit basis that shows whether Vaughn should sell unfinished or finished bookcases. If an amount reduces the net income then enter with a negative sign preceding the number, es. 15,000 or parenthesis, es. (15,000)